Fix missing Submitter/Agency on Auditing Errors tab

The authenticated user's DB ID was fetched in main.py for a role check
but never forwarded to handle_analyze_message, so Proof.created_by was
always NULL. This caused submitter_name and submitter_agency to resolve
to None on the Errors tab.

Fix: capture current_user_id from the role-check session in main.py,
pass it to handle_analyze_message, and forward it to
add_version_with_review as created_by. Newly submitted proofs will now
have their submitter recorded and visible in all three Auditing tabs.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/app/main.py

@@ -195,6 +195,7 @@ async def websocket_analyze(websocket: WebSocket):
                 logger.info(f"[MAIN] Authenticated user: {user_claims.get('name', 'unknown')}")
 
                 # Check role: oversight_admin cannot upload/analyze proofs
+                current_user_id: Optional[uuid.UUID] = None
                 try:
                     async with _session_factory() as ws_session:
                         ws_user_repo = UserRepository(ws_session)
@@ -206,6 +207,7 @@ async def websocket_analyze(websocket: WebSocket):
                                 "message": "Oversight Admin has read-only access and cannot analyze proofs."
                             })
                             continue
+                        current_user_id = ws_user.id if ws_user else None
                 except Exception as role_err:
                     logger.warning(f"[MAIN] Role check failed for client {client_id}: {role_err}")
 
@@ -224,6 +226,7 @@ async def websocket_analyze(websocket: WebSocket):
                     data=data,
                     manager=manager,
                     analysis_service=analysis_service,
+                    current_user_id=current_user_id,
                 )
             else:
                 logger.warning(f"[MAIN] Unknown message type: {data.get('type')}")

backend/app/websocket/handlers.py

@@ -21,6 +21,7 @@ async def handle_analyze_message(
     data: dict,
     manager: ConnectionManager,
     analysis_service: AnalysisService,
+    current_user_id: Optional[uuid.UUID] = None,
 ) -> None:
     """
     Handle an 'analyze' message from the client.
@@ -229,6 +230,7 @@ async def handle_analyze_message(
                         overall_status=result.overallStatus,
                         file_hash=file_hash,
                         is_identical_file=is_identical_file,
+                        created_by=current_user_id,
                     )
 
                     # Auto-create ErrorItem when analysis results in an error