feat(multi-user): add multi-user feature flag, owner_id model field, and user-scoped queries

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

app/tasks/convert_to_pdf.py

@@ -124,7 +124,9 @@ def _build_filename(file_path: str, original_filename: Optional[str], file_ext:
 
 
 @shared_task(bind=True)
-def convert_to_pdf(self, file_path: str, original_filename: Optional[str] = None) -> Optional[str]:
+def convert_to_pdf(
+    self, file_path: str, original_filename: Optional[str] = None, owner_id: Optional[str] = None
+) -> Optional[str]:
     """
     Converts a file to PDF using Gotenberg's API.
     Determines the appropriate Gotenberg endpoint based on the file's MIME type.
@@ -133,6 +135,7 @@ def convert_to_pdf(self, file_path: str, original_filename: Optional[str] = None
     Args:
         file_path: Path to the file to convert
         original_filename: Optional original filename (if different from path basename)
+        owner_id: Optional user identifier forwarded to process_document for multi-user mode.
     """
     task_id = self.request.id
     logger.info(f"[{task_id}] Starting PDF conversion: {file_path}")
@@ -332,9 +335,9 @@ def convert_to_pdf(self, file_path: str, original_filename: Optional[str] = None
                 # Change extension to .pdf for the original filename
                 original_base = os.path.splitext(original_filename)[0]
                 pdf_original_filename = f"{original_base}.pdf"
-                process_document.delay(converted_file_path, original_filename=pdf_original_filename)
+                process_document.delay(converted_file_path, original_filename=pdf_original_filename, owner_id=owner_id)
             else:
-                process_document.delay(converted_file_path)
+                process_document.delay(converted_file_path, owner_id=owner_id)
 
             return converted_file_path
         else:

app/tasks/process_document.py

@@ -25,7 +25,12 @@ logger = logging.getLogger(__name__)
 
 @celery.task(base=BaseTaskWithRetry, bind=True)
 def process_document(
-    self, original_local_file: str, original_filename: str = None, file_id: int = None, force_cloud_ocr: bool = False
+    self,
+    original_local_file: str,
+    original_filename: str = None,
+    file_id: int = None,
+    force_cloud_ocr: bool = False,
+    owner_id: str = None,
 ):
     """
     Process a document file and trigger appropriate text extraction.
@@ -37,6 +42,8 @@ def process_document(
                  detection and reuses the existing record (used for reprocessing).
         force_cloud_ocr: If True, forces Azure Document Intelligence OCR processing
                         regardless of embedded text quality. Used for re-processing.
+        owner_id: Optional user identifier for multi-user mode. When provided, the
+                  created FileRecord is associated with this user.
 
     Steps:
       1. Check if we have a FileRecord entry (via SHA-256 hash). If found, skip re-processing.
@@ -141,6 +148,7 @@ def process_document(
                     mime_type=mime_type,
                     is_duplicate=True,
                     duplicate_of_id=existing.id,
+                    owner_id=owner_id,
                 )
                 db.add(duplicate_record)
                 db.commit()
@@ -191,6 +199,7 @@ def process_document(
                 file_size=file_size,
                 mime_type=mime_type,
                 is_duplicate=False,
+                owner_id=owner_id,
             )
             db.add(new_record)
             db.commit()