feat(audit): log document_upload/extract_claims/export_docx (GAP-18, FU-7)

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

mcp-server/src/legal_mcp/tools/documents.py

@@ -8,7 +8,7 @@ from pathlib import Path
 from uuid import UUID
 
 from legal_mcp import config
-from legal_mcp.services import db, git_sync, processor
+from legal_mcp.services import audit, db, git_sync, processor
 
 
 async def document_upload(
@@ -87,6 +87,10 @@ async def document_upload(
     except Exception:
         pass  # git not available in container — non-critical
 
+    await audit.log_action_safe(
+        "document_upload", case_id=case_id, document_id=UUID(doc["id"]),
+        details={"title": title, "doc_type": actual_doc_type},
+    )
     return json.dumps({
         "document": doc,
         "processing": result,
@@ -344,6 +348,10 @@ async def extract_claims(
         )
         results.append(result)
 
+    await audit.log_action_safe(
+        "extract_claims", case_id=case_id,
+        details={"docs_processed": len(docs), "results": len(results)},
+    )
     return json.dumps(results, default=str, ensure_ascii=False, indent=2)