Fix three bugs found by code audit

- Delete failure retry loop: when delete_frigate_person_files() fails,
  remove the file from the tracker so the next candidate targets a
  different worst file rather than re-attempting the same failed delete.

- Interactive mode quality replacement: _configure_person() never set
  config["quality_replacement"], causing the executor to always default
  to False and silently skip all uploads for at-cap interactive jobs.
  Now mirrors auto_configure by reading Config.QUALITY_REPLACEMENT.

- Silent mapping loss on API flap: after a successful upload, if the
  post-upload GET /api/faces returns None (transient API failure),
  the file was silently left unmapped. Now logs a warning so users
  know quality replacement won't target that file.

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

winnow/jobs.py

@@ -139,7 +139,7 @@ def _configure_person(person: dict, people: list[dict]) -> dict | None:
     mode_choice = Prompt.ask("Choice", choices=["1", "2"], default="1")
     entity_type = "face" if mode_choice == "1" else "object"
 
-    config = {"name": name, "mode": entity_type}
+    config = {"name": name, "mode": entity_type, "quality_replacement": Config.QUALITY_REPLACEMENT}
     if entity_type == "object":
         config["object_class"] = Prompt.ask("Enter Object Class (e.g. dog, cat, car)", default="dog")