fix: resolve syntax errors in scan-skipped files

- Fix malformed f-strings in agent communication SDK
- Repair pricing strategy delimiters and optimizer blocks
- Normalize FastAPI session dependency signatures in routers
- Fix incomplete constructor, indentation, and empty exception blocks
- Restore syntax validity for files previously skipped by Bandit

cli/commands/marketplace.py

@@ -240,6 +240,7 @@ def ollama_task(ctx, gpu_id: str, model: str, prompt: str, temperature: float, m
         else:
             error(f"Failed to submit Ollama task: {response.status_code} {response.text}")
     except Exception as e:
+        error(f"Failed to submit Ollama task: {e}")
 
 
 @gpu.command(name="pay")