feat: implementar Fase 2 del roadmap (Modo Replica Exacta / Mirroring)

backend/app/services/upload_service.py

@@ -16,7 +16,8 @@ async def create_or_resume_session(
     file_size: int,
     sha256_full: str,
     chunk_size: int = 4 * 1024 * 1024,
-    job_id: Optional[int] = None
+    job_id: Optional[int] = None,
+    client_relative_path: Optional[str] = None
 ) -> Tuple[BackupSession, List[int]]:
     """
     Initializes a new upload session or resumes an existing incomplete session
@@ -63,6 +64,8 @@ async def create_or_resume_session(
         # Resume existing session
         received_chunks = await storage_provider.get_received_chunks(session.session_code)
         session.received_chunks_count = len(received_chunks)
+        if client_relative_path:
+            session.client_relative_path = client_relative_path
         await db.commit()
         await db.refresh(session)
         return session, received_chunks
@@ -72,6 +75,7 @@ async def create_or_resume_session(
         client_id=client.id,
         job_id=job_id,
         filename=filename,
+        client_relative_path=client_relative_path or filename,
         file_size=file_size,
         chunk_size=chunk_size,
         total_chunks=total_chunks,
@@ -242,6 +246,7 @@ async def complete_session(
             session_id=session.id,
             filename=session.filename,
             relative_path=rel_path,
+            client_relative_path=session.client_relative_path or session.filename,
             file_size=total_bytes,
             sha256=final_sha256,
             retention_tag="DAILY",