fix: use Optional[str] for attestation_token parameter type

attestation_token was declared as 'str = None' which is a type mismatch
(str cannot be None). Changed to Optional[str] = None across all 11
verifier files to match the bridge function's signature.

Author: rahuldass19

src/qwed_new/core/code_verifier.py

@@ -1092,7 +1092,7 @@ def verify_batch(self, snippets: List[Dict[str, str]]) -> DiagnosticResult:
             evidence=evidence,
         )
 
-    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: str = None) -> "VerificationContextDocument":
+    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: Optional[str] = None) -> "VerificationContextDocument":
         """Map a DiagnosticResult to a Verification Context v1.0 document."""
         from .verification_context_bridge import verification_context_from_diagnostic_result
         return verification_context_from_diagnostic_result(

src/qwed_new/core/consensus_verifier.py

@@ -964,7 +964,7 @@ def reset_circuit_breakers(self):
         if self.circuit_breaker:
             self.circuit_breaker._engines.clear()
 
-    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: str = None) -> "VerificationContextDocument":
+    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: Optional[str] = None) -> "VerificationContextDocument":
         """Map a DiagnosticResult to a Verification Context v1.0 document."""
         from .verification_context_bridge import verification_context_from_diagnostic_result
         return verification_context_from_diagnostic_result(

src/qwed_new/core/dsl_logic_verifier.py

@@ -551,7 +551,7 @@ def verify_from_natural_language(
             verification_result.dsl_code = dsl_code
         return verification_result
 
-    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: str = None) -> "VerificationContextDocument":
+    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: Optional[str] = None) -> "VerificationContextDocument":
         """Map a DiagnosticResult to a Verification Context v1.0 document."""
         from .verification_context_bridge import verification_context_from_diagnostic_result
         return verification_context_from_diagnostic_result(

src/qwed_new/core/fact_verifier.py

@@ -624,7 +624,7 @@ def _tokenize(self, text: str) -> set:
         """Tokenize text into lowercase words."""
         return set(re.findall(r'\b[a-zA-Z]+\b', text.lower()))
 
-    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: str = None) -> "VerificationContextDocument":
+    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: Optional[str] = None) -> "VerificationContextDocument":
         """Map a DiagnosticResult to a Verification Context v1.0 document."""
         from .verification_context_bridge import verification_context_from_diagnostic_result
         return verification_context_from_diagnostic_result(
@@ -728,7 +728,7 @@ def verify_batch(
             extra_evidence=extra_evidence,
         )
 
-    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: str = None) -> "VerificationContextDocument":
+    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: Optional[str] = None) -> "VerificationContextDocument":
         """Map a DiagnosticResult to a Verification Context v1.0 document."""
         from .verification_context_bridge import verification_context_from_diagnostic_result
         return verification_context_from_diagnostic_result(

src/qwed_new/core/graph_fact_verifier.py

@@ -586,7 +586,7 @@ def verify_with_nli(
             }
         )
 
-    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: str = None) -> "VerificationContextDocument":
+    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: Optional[str] = None) -> "VerificationContextDocument":
         """Map a DiagnosticResult to a Verification Context v1.0 document."""
         from .verification_context_bridge import verification_context_from_diagnostic_result
         return verification_context_from_diagnostic_result(

src/qwed_new/core/image_verifier.py

@@ -598,7 +598,7 @@ def verify_batch(
             extra_evidence=extra_evidence,
         )
 
-    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: str = None) -> "VerificationContextDocument":
+    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: Optional[str] = None) -> "VerificationContextDocument":
         """Map a DiagnosticResult to a Verification Context v1.0 document."""
         from .verification_context_bridge import verification_context_from_diagnostic_result
         return verification_context_from_diagnostic_result(
@@ -701,7 +701,7 @@ def verify_with_consensus(
             }
         )
 
-    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: str = None) -> "VerificationContextDocument":
+    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: Optional[str] = None) -> "VerificationContextDocument":
         """Map a DiagnosticResult to a Verification Context v1.0 document."""
         from .verification_context_bridge import verification_context_from_diagnostic_result
         return verification_context_from_diagnostic_result(

src/qwed_new/core/logic_verifier.py

@@ -956,7 +956,7 @@ def check_vacuity(
                 {"constraint_id": _CONSTRAINT_ID_EXECUTION_ERROR, "error_type": type(exc).__name__},
             )
 
-    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: str = None) -> "VerificationContextDocument":
+    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: Optional[str] = None) -> "VerificationContextDocument":
         """Map a DiagnosticResult to a Verification Context v1.0 document."""
         from .verification_context_bridge import verification_context_from_diagnostic_result
         return verification_context_from_diagnostic_result(

src/qwed_new/core/reasoning_verifier.py

@@ -754,7 +754,7 @@ def get_cache_stats(self) -> Dict[str, int]:
             "max_size": self._cache_max_size
         }
 
-    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: str = None) -> "VerificationContextDocument":
+    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: Optional[str] = None) -> "VerificationContextDocument":
         """Map a DiagnosticResult to a Verification Context v1.0 document."""
         from .verification_context_bridge import verification_context_from_diagnostic_result
         return verification_context_from_diagnostic_result(

src/qwed_new/core/schema_verifier.py

@@ -1559,7 +1559,7 @@ def verify_ucp_transaction(
             proof_data=proof_data,
         )
 
-    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: str = None) -> "VerificationContextDocument":
+    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: Optional[str] = None) -> "VerificationContextDocument":
         """Map a DiagnosticResult to a Verification Context v1.0 document."""
         from .verification_context_bridge import verification_context_from_diagnostic_result
         return verification_context_from_diagnostic_result(

src/qwed_new/core/sql_verifier.py

@@ -808,7 +808,7 @@ def verify_batch(
             developer_fields=batch_fields,
         )
 
-    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: str = None) -> "VerificationContextDocument":
+    def to_verification_context(self, result: "DiagnosticResult", query: str, attestation_token: Optional[str] = None) -> "VerificationContextDocument":
         """Map a DiagnosticResult to a Verification Context v1.0 document."""
         from .verification_context_bridge import verification_context_from_diagnostic_result
         return verification_context_from_diagnostic_result(