fix(doctor): exclude checkpoints/embeddings from duplicate filename detection (#934)

Duplicate filename detection is only relevant for LoRAs, which use
basename-only syntax (<lora:name:strength>). Checkpoints and diffusion
models reference files via relative paths with extensions, so filename
conflicts there are false positives — there is no resolution ambiguity.

Both _log_duplicate_filename_summary() and DoctorHandler's
_check_filename_conflicts() now skip scanners with model_type != 'lora'.

py/routes/handlers/misc_handlers.py

@@ -995,6 +995,12 @@ class DoctorHandler:
         total_conflict_files = 0
 
         for model_type, label, factory in self._scanner_factories:
+            # Duplicate filename detection targets LoRAs which use basename-only
+            # syntax (<lora:name:strength>). Checkpoints/embeddings reference
+            # models via relative paths with extensions, so conflicts there would
+            # be false positives.
+            if model_type != "lora":
+                continue
             try:
                 scanner = await factory()
                 hash_index = getattr(scanner, "_hash_index", None)