semantics: complete DEF-to-region migration, fix regressions

- Convert legacy [DEF🆔Type] anchors to #region/#endregion across 329 files
- Reinstate _normalize_timestamp_value in sql_generator.py
- Fix MarkerLogger→logger migration in events.py (molecular CoT markers)
- Fix dataset_review orchestrator dependencies (_build_execution_snapshot)
- Fix config_manager stale-record deletion (moved to save path only)
- Add 77 missing [/DEF:] closers in 5 unbalanced test files
- Update assistant_chat.integration.test.js for #region format
- Apply molecular-cot-logging markers (REASON/REFLECT/EXPLORE) via logger.* methods

backend/src/scripts/clean_release_cli.py

@@ -1,7 +1,7 @@
 # #region CleanReleaseCliScript [C:3] [TYPE Module] [SEMANTICS cli, clean-release, candidate, artifacts, manifest]
 # @BRIEF Provide headless CLI commands for candidate registration, artifact import and manifest build.
-# @LAYER Scripts
-# @RELATION CALLS -> [ComplianceOrchestrator]
+# @LAYER: Scripts
+# @RELATION CALLS -> ComplianceOrchestrator
 
 from __future__ import annotations
 
@@ -102,8 +102,8 @@ def build_parser() -> argparse.ArgumentParser:
 
 # #region run_candidate_register [TYPE Function]
 # @BRIEF Register candidate in repository via CLI command.
-# @PRE Candidate ID must be unique.
-# @POST Candidate is persisted in DRAFT status.
+# @PRE: Candidate ID must be unique.
+# @POST: Candidate is persisted in DRAFT status.
 def run_candidate_register(args: argparse.Namespace) -> int:
     from ..dependencies import get_clean_release_repository
 
@@ -131,8 +131,8 @@ def run_candidate_register(args: argparse.Namespace) -> int:
 
 # #region run_artifact_import [TYPE Function]
 # @BRIEF Import single artifact for existing candidate.
-# @PRE Candidate must exist.
-# @POST Artifact is persisted for candidate.
+# @PRE: Candidate must exist.
+# @POST: Artifact is persisted for candidate.
 def run_artifact_import(args: argparse.Namespace) -> int:
     from ..dependencies import get_clean_release_repository
 
@@ -164,8 +164,8 @@ def run_artifact_import(args: argparse.Namespace) -> int:
 
 # #region run_manifest_build [TYPE Function]
 # @BRIEF Build immutable manifest snapshot for candidate.
-# @PRE Candidate must exist.
-# @POST New manifest version is persisted.
+# @PRE: Candidate must exist.
+# @POST: New manifest version is persisted.
 def run_manifest_build(args: argparse.Namespace) -> int:
     from ..dependencies import get_clean_release_repository
     from ..services.clean_release.manifest_service import build_manifest_snapshot
@@ -198,8 +198,8 @@ def run_manifest_build(args: argparse.Namespace) -> int:
 
 # #region run_compliance_run [TYPE Function]
 # @BRIEF Execute compliance run for candidate with optional manifest fallback.
-# @PRE Candidate exists and trusted snapshots are configured.
-# @POST Returns run payload and exit code 0 on success.
+# @PRE: Candidate exists and trusted snapshots are configured.
+# @POST: Returns run payload and exit code 0 on success.
 def run_compliance_run(args: argparse.Namespace) -> int:
     from ..dependencies import get_clean_release_repository, get_config_manager
 
@@ -237,8 +237,8 @@ def run_compliance_run(args: argparse.Namespace) -> int:
 
 # #region run_compliance_status [TYPE Function]
 # @BRIEF Read run status by run id.
-# @PRE Run exists.
-# @POST Returns run status payload.
+# @PRE: Run exists.
+# @POST: Returns run status payload.
 def run_compliance_status(args: argparse.Namespace) -> int:
     from ..dependencies import get_clean_release_repository
 
@@ -269,8 +269,8 @@ def run_compliance_status(args: argparse.Namespace) -> int:
 
 # #region _to_payload [TYPE Function]
 # @BRIEF Serialize domain models for CLI JSON output across SQLAlchemy/Pydantic variants.
-# @PRE value is serializable model or primitive object.
-# @POST Returns dictionary payload without mutating value.
+# @PRE: value is serializable model or primitive object.
+# @POST: Returns dictionary payload without mutating value.
 def _to_payload(value: Any) -> Dict[str, Any]:
     def _normalize(raw: Any) -> Any:
         if isinstance(raw, datetime):
@@ -299,8 +299,8 @@ def _to_payload(value: Any) -> Dict[str, Any]:
 
 # #region run_compliance_report [TYPE Function]
 # @BRIEF Read immutable report by run id.
-# @PRE Run and report exist.
-# @POST Returns report payload.
+# @PRE: Run and report exist.
+# @POST: Returns report payload.
 def run_compliance_report(args: argparse.Namespace) -> int:
     from ..dependencies import get_clean_release_repository
 
@@ -326,8 +326,8 @@ def run_compliance_report(args: argparse.Namespace) -> int:
 
 # #region run_compliance_violations [TYPE Function]
 # @BRIEF Read run violations by run id.
-# @PRE Run exists.
-# @POST Returns violations payload.
+# @PRE: Run exists.
+# @POST: Returns violations payload.
 def run_compliance_violations(args: argparse.Namespace) -> int:
     from ..dependencies import get_clean_release_repository
 
@@ -351,8 +351,8 @@ def run_compliance_violations(args: argparse.Namespace) -> int:
 
 # #region run_approve [TYPE Function]
 # @BRIEF Approve candidate based on immutable PASSED report.
-# @PRE Candidate and report exist; report is PASSED.
-# @POST Persists APPROVED decision and returns success payload.
+# @PRE: Candidate and report exist; report is PASSED.
+# @POST: Persists APPROVED decision and returns success payload.
 def run_approve(args: argparse.Namespace) -> int:
     from ..dependencies import get_clean_release_repository
 
@@ -382,8 +382,8 @@ def run_approve(args: argparse.Namespace) -> int:
 
 # #region run_reject [TYPE Function]
 # @BRIEF Reject candidate without mutating compliance evidence.
-# @PRE Candidate and report exist.
-# @POST Persists REJECTED decision and returns success payload.
+# @PRE: Candidate and report exist.
+# @POST: Persists REJECTED decision and returns success payload.
 def run_reject(args: argparse.Namespace) -> int:
     from ..dependencies import get_clean_release_repository
 
@@ -413,8 +413,8 @@ def run_reject(args: argparse.Namespace) -> int:
 
 # #region run_publish [TYPE Function]
 # @BRIEF Publish approved candidate to target channel.
-# @PRE Candidate is approved and report belongs to candidate.
-# @POST Appends ACTIVE publication record and returns payload.
+# @PRE: Candidate is approved and report belongs to candidate.
+# @POST: Appends ACTIVE publication record and returns payload.
 def run_publish(args: argparse.Namespace) -> int:
     from ..dependencies import get_clean_release_repository
 
@@ -441,8 +441,8 @@ def run_publish(args: argparse.Namespace) -> int:
 
 # #region run_revoke [TYPE Function]
 # @BRIEF Revoke active publication record.
-# @PRE Publication id exists and is ACTIVE.
-# @POST Publication record status becomes REVOKED.
+# @PRE: Publication id exists and is ACTIVE.
+# @POST: Publication record status becomes REVOKED.
 def run_revoke(args: argparse.Namespace) -> int:
     from ..dependencies import get_clean_release_repository