*: re-vendor kvproto at b41e863 (2026-06-22) and record the vendored revision

The vendored protos were an unrecorded late-2023/early-2024 vintage (errorpb
and pdpb untouched since #324, one hand-patched addition from #519). Nothing
recorded which kvproto revision they came from, and the staleness now blocks
real features.

Re-vendor everything at pingcap/kvproto b41e86365ce0 — the revision client-go
currently pins — and add proto/VERSION so the vintage is never again guesswork.
Regenerated with the existing tonic-build pipeline (21 files). One mechanical
source fix: pdpb.RequestHeader gained caller_component/caller_id, so the TSO
stream's header construction now defaults the new fields.

This commit is the re-vendor and nothing else. Newly available surface includes
KvFlush / KvBufferBatchGet (pipelined DML), HealthFeedback, and
pdpb.BatchScanRegions.

Two new protocol semantics become VISIBLE with the refresh —
errorpb.UndeterminedResult (an unknown raft apply outcome) and shared locks
(SharedLock / SharedPessimisticLock, whose real holders live in
shared_lock_infos). Handling them is deliberately left to follow-up PRs so this
one stays a pure re-vendor. Neither is a regression introduced here:

- UndeterminedResult falls through to the generic region-error arm, which
  backs off and retries — the same default the follow-up keeps for every plan
  that is not a commit point.
- A shared-lock wrapper carries no key bytes on the wire regardless of which
  proto vintage parses it, so the keyspace truncation hazard predates this
  commit; the refresh only makes the wrapper identifiable.

Tests: make check green; 67 lib tests; txn/raw/failpoint integration suites
green against a local api-v2 cluster.

Signed-off-by: Eduard R. <eduard@ralphovi.net>

Author: eduralph

proto/VERSION

@@ -0,0 +1,3 @@
+pingcap/kvproto b41e86365ce0e0fba482005c0dfa5e2ca967d74c (2026-06-22)
+Matches client-go v2.0.8-0.20260708122311-01bd8f99f4da (go.mod: kvproto v0.0.0-20260622063236-b41e86365ce0).
+Re-vendor: copy proto/*.proto (matching names only) and include/ from that revision, then `make generate`.

proto/autoid.proto

@@ -4,44 +4,45 @@ package autoid;
 import "gogoproto/gogo.proto";
 import "rustproto.proto";
 
-option (gogoproto.sizer_all) = true;
+option java_package = "org.tikv.kvproto";
+option (gogoproto.goproto_sizecache_all) = false;
+option (gogoproto.goproto_unkeyed_all) = false;
+option (gogoproto.goproto_unrecognized_all) = false;
 option (gogoproto.marshaler_all) = true;
+option (gogoproto.sizer_all) = true;
 option (gogoproto.unmarshaler_all) = true;
 option (rustproto.lite_runtime_all) = true;
 
-option java_package = "org.tikv.kvproto";
-
 message AutoIDRequest {
-	int64 dbID = 1;
-	int64 tblID = 2;
-	bool isUnsigned = 3;
-	uint64 n = 4;
-	int64 increment = 5;
-	int64 offset = 6;
-	uint32 keyspaceID = 7;
+  int64 dbID = 1;
+  int64 tblID = 2;
+  bool isUnsigned = 3;
+  uint64 n = 4;
+  int64 increment = 5;
+  int64 offset = 6;
+  uint32 keyspaceID = 7;
 }
 
 message AutoIDResponse {
-	int64 min = 1;
-	int64 max = 2;
+  int64 min = 1;
+  int64 max = 2;
 
-	bytes errmsg = 3;
+  bytes errmsg = 3;
 }
 
 message RebaseRequest {
-	int64 dbID = 1;
-	int64 tblID = 2;
-	bool isUnsigned = 3;
-	int64 base = 4;
-	bool force = 5;
+  int64 dbID = 1;
+  int64 tblID = 2;
+  bool isUnsigned = 3;
+  int64 base = 4;
+  bool force = 5;
 }
 
 message RebaseResponse {
-	bytes errmsg = 1;
+  bytes errmsg = 1;
 }
 
 service AutoIDAlloc {
-    rpc AllocAutoID(AutoIDRequest) returns (AutoIDResponse) {}
-    rpc Rebase(RebaseRequest) returns (RebaseResponse) {}
+  rpc AllocAutoID(AutoIDRequest) returns (AutoIDResponse) {}
+  rpc Rebase(RebaseRequest) returns (RebaseResponse) {}
 }
-