feat(assets): register output files as assets after prompt execution

Add ingest_existing_file() to services/ingest.py as a public wrapper for
registering on-disk files (stat, BLAKE3 hash, MIME detection, path-based
tag derivation).

After each prompt execution in the main loop, iterate
history_result['outputs'] and register files with type 'output' as
assets. Runs while the asset seeder is paused, gated behind
asset_seeder.is_disabled(). Stores prompt_id in user_metadata for
provenance tracking.

Ingest uses a two-phase approach: insert a stub record (hash=NULL) first
for instant visibility, then defer hashing to the background seeder
enrich phase to avoid blocking the prompt worker thread.

When multiple enrich scans are enqueued while the seeder is busy, roots
are now unioned and compute_hashes uses sticky-true (OR) logic so no
queued work is silently dropped.

Extract _reset_to_idle helper in the asset seeder to deduplicate the
state reset pattern shared by _run_scan and mark_missing_outside_prefixes.

Separate history parsing from output file registration: move generic
file registration logic into register_output_files() in
app/assets/services/ingest.py, keeping only the ComfyUI history format
parsing (_collect_output_absolute_paths) in main.py.

main.py

@@ -8,6 +8,8 @@ import folder_paths
 import time
 from comfy.cli_args import args, enables_dynamic_vram
 from app.logger import setup_logger
+from app.assets.seeder import asset_seeder
+from app.assets.services import register_output_files
 import itertools
 import utils.extra_config
 from utils.mime_types import init_mime_types
@@ -182,7 +184,6 @@ if 'torch' in sys.modules:
 
 
 import comfy.utils
-from app.assets.seeder import asset_seeder
 
 import execution
 import server
@@ -230,6 +231,24 @@ def cuda_malloc_warning():
             logging.warning("\nWARNING: this card most likely does not support cuda-malloc, if you get \"CUDA error\" please run ComfyUI with: --disable-cuda-malloc\n")
 
 
+def _collect_output_absolute_paths(history_result: dict) -> list[str]:
+    """Extract absolute file paths for output items from a history result."""
+    paths = []
+    base_dir = folder_paths.get_directory_by_type("output")
+    for node_output in history_result.get("outputs", {}).values():
+        for items in node_output.values():
+            if not isinstance(items, list):
+                continue
+            for item in items:
+                if not isinstance(item, dict) or item.get("type") != "output":
+                    continue
+                filename = item.get("filename")
+                if not filename:
+                    continue
+                paths.append(os.path.join(base_dir, item.get("subfolder", ""), filename))
+    return paths
+
+
 def prompt_worker(q, server_instance):
     current_time: float = 0.0
     cache_type = execution.CacheType.CLASSIC
@@ -264,6 +283,7 @@ def prompt_worker(q, server_instance):
 
             asset_seeder.pause()
             e.execute(item[2], prompt_id, extra_data, item[4])
+
             need_gc = True
 
             remove_sensitive = lambda prompt: prompt[:5] + prompt[6:]
@@ -307,6 +327,11 @@ def prompt_worker(q, server_instance):
                 last_gc_collect = current_time
                 need_gc = False
                 hook_breaker_ac10a0.restore_functions()
+
+                if not asset_seeder.is_disabled():
+                    paths = _collect_output_absolute_paths(e.history_result)
+                    if register_output_files(paths, user_metadata={"prompt_id": prompt_id}) > 0:
+                        asset_seeder.enqueue_enrich(roots=("output",), compute_hashes=True)
                 asset_seeder.resume()