feat(attachments): scan enumerates all; import_file maps 'attached' + member ML

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

backend/app/tasks/scan.py

@@ -11,7 +11,20 @@ from sqlalchemy.orm import sessionmaker
 from ..celery_app import celery
 from ..config import get_config
 from ..models import ImportBatch, ImportSettings, ImportTask
-from ..services.importer import is_supported
+
+
+def _iter_import_files(import_root: Path):
+    """Every regular file except sidecar .json, dotfiles, and .partial
+    temp files. The Importer dispatches by kind (media / archive /
+    other) — scan no longer filters to media (FC-2d-iii)."""
+    for entry in import_root.rglob("*"):
+        if not entry.is_file():
+            continue
+        if entry.name.startswith("."):
+            continue
+        if entry.suffix.lower() in (".json", ".partial"):
+            continue
+        yield entry
 
 
 def _sync_session_factory():
@@ -42,11 +55,7 @@ def scan_directory(self, triggered_by: str = "manual") -> int:
 
         # Walk and enumerate.
         files_seen = 0
-        for entry in import_root.rglob("*"):
-            if not entry.is_file():
-                continue
-            if not is_supported(entry):
-                continue
+        for entry in _iter_import_files(import_root):
             try:
                 size = entry.stat().st_size
             except OSError: