Add debug logging to cache lookup

README.md

@@ -36,9 +36,12 @@ Interactive docs: http://localhost:8100/docs
 | POST | `/runs` | Start a rendering run |
 | GET | `/runs` | List all runs |
 | GET | `/runs/{run_id}` | Get run status |
+| DELETE | `/runs/{run_id}` | Delete a run |
 | GET | `/cache` | List cached content hashes |
 | GET | `/cache/{hash}` | Download cached content |
+| DELETE | `/cache/{hash}` | Delete cached content |
 | POST | `/cache/import?path=` | Import local file to cache |
+| POST | `/cache/upload` | Upload file to cache |
 | GET | `/assets` | List known assets |
 
 ### Start a run
@@ -55,6 +58,24 @@ curl -X POST http://localhost:8100/runs \
 curl http://localhost:8100/runs/{run_id}
 ```
 
+### Delete a run
+
+```bash
+curl -X DELETE http://localhost:8100/runs/{run_id} \
+  -H "Authorization: Bearer <token>"
+```
+
+Note: Failed runs can always be deleted. Completed runs can only be deleted if their outputs haven't been published to L2.
+
+### Delete cached content
+
+```bash
+curl -X DELETE http://localhost:8100/cache/{hash} \
+  -H "Authorization: Bearer <token>"
+```
+
+Note: Items that are inputs/outputs of runs, or published to L2, cannot be deleted.
+
 ## Storage
 
 - **Cache**: `~/.artdag/cache/` (content-addressed files)