Prune log files before uploading, not after

The upload was failing with the 10k-files-per-directory error because
pruning ran after the upload attempt. Moving prune first clears space
so the new file can always be written.

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

logging_utils.py

@@ -176,12 +176,12 @@ def log_inference(pil_inputs, output_pil, prompt, seed, steps, guidance_scale,
         print(f"[log]   create_repo:       {_time.perf_counter() - _t2:.3f}s")
 
         _t3 = _time.perf_counter()
-        _upload_parquet(api, DATASET_REPO, table, path_in_repo)
-        print(f"[log]   upload_parquet:    {_time.perf_counter() - _t3:.3f}s")
+        _prune_old_files(api, DATASET_REPO, MAX_LOG_FILES)
+        print(f"[log]   prune_old_files:   {_time.perf_counter() - _t3:.3f}s")
 
         _t4 = _time.perf_counter()
-        _prune_old_files(api, DATASET_REPO, MAX_LOG_FILES)
-        print(f"[log]   prune_old_files:   {_time.perf_counter() - _t4:.3f}s")
+        _upload_parquet(api, DATASET_REPO, table, path_in_repo)
+        print(f"[log]   upload_parquet:    {_time.perf_counter() - _t4:.3f}s")
 
         _t5 = _time.perf_counter()
         _maybe_squash_history(api, DATASET_REPO, now)