chore(rebase): reconcile with develop and apply ruff format

After rebasing onto current develop:
- chroma.py: keep develop's quarantine_stale_hnsw + UnsupportedFilterError
  validation alongside this PR's _pin_hnsw_threads retrofit.
- tests/test_backends.py: combine quarantine_stale_hnsw and
  _pin_hnsw_threads test sections; ruff format.
- miner.py: propagate the new `files=` kwarg (added on develop in #1183
  for the init -> mine flow) through _mine_impl so the caller can pass
  a pre-scanned file list under the global lock.

tests/test_backends.py

@@ -483,9 +483,7 @@ def test_get_collection_applies_retrofit_on_existing_palace(tmp_path):
 
     # Simulate a legacy palace: create collection without num_threads
     bootstrap_client = chromadb.PersistentClient(path=str(palace_path))
-    bootstrap_client.create_collection(
-        "mempalace_drawers", metadata={"hnsw:space": "cosine"}
-    )
+    bootstrap_client.create_collection("mempalace_drawers", metadata={"hnsw:space": "cosine"})
     del bootstrap_client  # drop reference so a fresh client reopens cleanly
 
     wrapper = ChromaBackend().get_collection(
@@ -494,6 +492,4 @@ def test_get_collection_applies_retrofit_on_existing_palace(tmp_path):
         create=False,
     )
 
-    assert (
-        wrapper._collection.configuration_json["hnsw"]["num_threads"] == 1
-    )
+    assert wrapper._collection.configuration_json["hnsw"]["num_threads"] == 1