Fix async event loop conflict in resolve_asset

When running with --pool=solo, there may already be a running event loop.
Use thread pool to run async coroutines when a loop is already running.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tasks/streaming.py

@@ -61,19 +61,32 @@ def resolve_asset(ref: str, actor_id: Optional[str] = None) -> Optional[Path]:
         import database
         from database import resolve_friendly_name
 
-        try:
-            # Reuse event loop for database operations
-            if _resolve_loop is None or _resolve_loop.is_closed():
-                _resolve_loop = asyncio.new_event_loop()
-                asyncio.set_event_loop(_resolve_loop)
-                _db_initialized = False
+        def _run_async(coro):
+            """Run async coroutine, handling both running and non-running event loops."""
+            global _resolve_loop, _db_initialized
+            try:
+                # Check if there's already a running loop
+                loop = asyncio.get_running_loop()
+                # Loop is running - use nest_asyncio or thread
+                import concurrent.futures
+                with concurrent.futures.ThreadPoolExecutor() as pool:
+                    future = pool.submit(asyncio.run, coro)
+                    return future.result(timeout=30)
+            except RuntimeError:
+                # No running loop - create one
+                if _resolve_loop is None or _resolve_loop.is_closed():
+                    _resolve_loop = asyncio.new_event_loop()
+                    asyncio.set_event_loop(_resolve_loop)
+                    _db_initialized = False
+                return _resolve_loop.run_until_complete(coro)
 
-            # Initialize database pool once per loop
+        try:
+            # Initialize database if needed
             if not _db_initialized:
-                _resolve_loop.run_until_complete(database.init_db())
+                _run_async(database.init_db())
                 _db_initialized = True
 
-            cid = _resolve_loop.run_until_complete(resolve_friendly_name(actor_id, ref))
+            cid = _run_async(resolve_friendly_name(actor_id, ref))
             print(f"RESOLVE_ASSET: resolve_friendly_name({actor_id}, {ref}) = {cid}", file=sys.stderr)
 
             if cid:
@@ -86,7 +99,7 @@ def resolve_asset(ref: str, actor_id: Optional[str] = None) -> Optional[Path]:
 
                 # File not in local cache - look up IPFS CID and fetch
                 # The cid from friendly_names is internal, need to get ipfs_cid from cache_items
-                ipfs_cid = _resolve_loop.run_until_complete(database.get_ipfs_cid(cid))
+                ipfs_cid = _run_async(database.get_ipfs_cid(cid))
                 if not ipfs_cid or ipfs_cid == cid:
                     # No separate IPFS CID, try using the cid directly (might be IPFS CID)
                     ipfs_cid = cid