test: correct stale <3.14 comment in ALTK test import guards

The module-level import skips in the ALTK agent tests carried an
outdated comment claiming "agent-lifecycle-toolkit is gated to
python_version<'3.14' upstream". That is no longer accurate:
agent-lifecycle-toolkit 0.10.1 dropped the <3.14 cap (now requires
>=3.10), and this PR removes the langflow <3.14 marker on the altk extra.

The skip itself is preserved -- altk is an optional extra
(langflow-base[altk]) that may be absent from a given environment, so
the ImportError guard is still required. Only the comment is corrected,
to state the real reason for the skip plus the upstream change. Applied
to all four files carrying the identical comment (test_altk_agent,
test_altk_agent_logic, test_altk_agent_tool_conversion,
test_conversation_context_ordering).

Also tag a pre-existing fake test key (api_key="sk-test") with
`# pragma: allowlist secret`; the comment shift re-staged the file and
surfaced it to detect-secrets.

Validated (Python 3.13, altk installed): ruff clean; the three logic
modules run (64 passed, 4 skipped) and test_altk_agent collects (13).

Author: erichare

src/backend/tests/unit/components/models_and_agents/test_altk_agent.py

@@ -7,7 +7,8 @@
 try:
     import altk  # noqa: F401
 except ImportError:
-    # agent-lifecycle-toolkit is gated to python_version<'3.14' upstream.
+    # agent-lifecycle-toolkit is an optional extra (langflow-base[altk]); skip if
+    # not installed. (Upstream dropped its <3.14 cap in 0.10.1, now requires >=3.10.)
     pytest.skip("altk (agent-lifecycle-toolkit) not available", allow_module_level=True)
 
 from langflow.custom import Component

src/backend/tests/unit/components/models_and_agents/test_altk_agent_logic.py

@@ -12,7 +12,8 @@
 try:
     import altk  # noqa: F401
 except ImportError:
-    # agent-lifecycle-toolkit is gated to python_version<'3.14' upstream.
+    # agent-lifecycle-toolkit is an optional extra (langflow-base[altk]); skip if
+    # not installed. (Upstream dropped its <3.14 cap in 0.10.1, now requires >=3.10.)
     pytest.skip("altk (agent-lifecycle-toolkit) not available", allow_module_level=True)
 
 from langchain_core.messages import HumanMessage
@@ -1669,7 +1670,7 @@ def test_should_return_lc_runnable_not_compiled_state_graph_when_creating_agent_
             response_processing_size_threshold=50,
             system_prompt="Test prompt",
             model_name="gpt-4o",
-            api_key="sk-test",
+            api_key="sk-test",  # pragma: allowlist secret
             handle_parsing_errors=True,
             max_iterations=10,
         )

src/backend/tests/unit/components/models_and_agents/test_altk_agent_tool_conversion.py

@@ -3,7 +3,8 @@
 try:
     import altk  # noqa: F401
 except ImportError:
-    # agent-lifecycle-toolkit is gated to python_version<'3.14' upstream.
+    # agent-lifecycle-toolkit is an optional extra (langflow-base[altk]); skip if
+    # not installed. (Upstream dropped its <3.14 cap in 0.10.1, now requires >=3.10.)
     pytest.skip("altk (agent-lifecycle-toolkit) not available", allow_module_level=True)
 
 from langchain_core.tools import BaseTool

src/backend/tests/unit/components/models_and_agents/test_conversation_context_ordering.py

@@ -10,7 +10,8 @@
 try:
     import altk  # noqa: F401
 except ImportError:
-    # agent-lifecycle-toolkit is gated to python_version<'3.14' upstream.
+    # agent-lifecycle-toolkit is an optional extra (langflow-base[altk]); skip if
+    # not installed. (Upstream dropped its <3.14 cap in 0.10.1, now requires >=3.10.)
     pytest.skip("altk (agent-lifecycle-toolkit) not available", allow_module_level=True)
 
 from langchain_core.messages import AIMessage, HumanMessage