fix(final-phase): finalize dataset review audit blockers

backend/src/services/dataset_review/event_logger.py

@@ -1,4 +1,4 @@
-# [DEF:SessionEventLogger:Module]
+# [DEF:SessionEventLoggerModule:Module]
 # @COMPLEXITY: 4
 # @SEMANTICS: dataset_review, audit, session_events, persistence, observability
 # @PURPOSE: Persist explicit session mutation events for dataset-review audit trails without weakening ownership or approval invariants.
@@ -8,10 +8,11 @@
 # @PRE: Caller provides an owned session scope and an authenticated actor identifier for each persisted mutation event.
 # @POST: Every logged event is committed as an explicit, queryable audit record with deterministic event metadata.
 # @SIDE_EFFECT: Inserts persisted session event rows and emits runtime belief-state logs for audit-sensitive mutations.
+# @DATA_CONTRACT: Input[SessionEventPayload] -> Output[SessionEvent]
 
 from __future__ import annotations
 
-# [DEF:SessionEventLogger.imports:Block]
+# [DEF:SessionEventLoggerImports:Block]
 from dataclasses import dataclass, field
 from typing import Any, Dict, Optional
 
@@ -19,7 +20,7 @@ from sqlalchemy.orm import Session
 
 from src.core.logger import belief_scope, logger
 from src.models.dataset_review import DatasetReviewSession, SessionEvent
-# [/DEF:SessionEventLogger.imports:Block]
+# [/DEF:SessionEventLoggerImports:Block]
 
 
 # [DEF:SessionEventPayload:Class]
@@ -41,10 +42,11 @@ class SessionEventPayload:
 # @COMPLEXITY: 4
 # @PURPOSE: Persist explicit dataset-review session audit events with meaningful runtime reasoning logs.
 # @RELATION: [DEPENDS_ON] ->[SessionEvent]
-# @RELATION: [DEPENDS_ON] ->[sqlalchemy.orm.Session]
+# @RELATION: [DEPENDS_ON] ->[SessionEventPayload]
 # @PRE: The database session is live and payload identifiers are non-empty.
 # @POST: Returns the committed session event row with a stable identifier and stored detail payload.
 # @SIDE_EFFECT: Writes one audit row to persistence and emits logger.reason/logger.reflect traces.
+# @DATA_CONTRACT: Input[SessionEventPayload] -> Output[SessionEvent]
 class SessionEventLogger:
     # [DEF:SessionEventLogger.__init__:Function]
     # @COMPLEXITY: 2
@@ -153,4 +155,4 @@ class SessionEventLogger:
     # [/DEF:SessionEventLogger.log_for_session:Function]
 # [/DEF:SessionEventLogger:Class]
 
-# [/DEF:SessionEventLogger:Module]
+# [/DEF:SessionEventLoggerModule:Module]

backend/src/services/git_service.py

@@ -65,7 +65,13 @@ class GitService:
         base = Path(self.base_path)
         if base.exists() and not base.is_dir():
             raise ValueError(f"Git repositories base path is not a directory: {self.base_path}")
-        base.mkdir(parents=True, exist_ok=True)
+        try:
+            base.mkdir(parents=True, exist_ok=True)
+        except (PermissionError, OSError) as e:
+            logger.warning(
+                f"[_ensure_base_path_exists][Coherence:Failed] Cannot create Git repositories base path: {self.base_path}. Error: {e}"
+            )
+            raise ValueError(f"Cannot create Git repositories base path: {self.base_path}. {e}")
     # [/DEF:backend.src.services.git_service.GitService._ensure_base_path_exists:Function]
 
     # [DEF:backend.src.services.git_service.GitService._resolve_base_path:Function]