fix: overnight loop provider resolution — explicit Ollama

The overnight tightening loop had a 99% error rate (11,058/11,210 tasks)
because resolve_runtime_provider() returned provider='local' which the
AIAgent doesn't recognize.

Fix: Bypass resolve_runtime_provider() entirely. The overnight loop
always runs against local Ollama inference — hardcode it.

Changes:
- Removed dependency on hermes_cli.runtime_provider
- Explicit Ollama provider (http://localhost:11434/v1)
- Model configurable via OVERNIGHT_MODEL env var (default: hermes4:14b)
- Base URL configurable via OVERNIGHT_BASE_URL env var

Before: 1% pass rate (139/11,210 over 1,121 cycles)
After: Should match Ollama availability (near 100% when running)

scripts/timmy_overnight_loop.py

@@ -104,20 +104,23 @@ def run_task(task: dict, run_number: int) -> dict:
 
     sys.path.insert(0, str(AGENT_DIR))
     try:
-        from hermes_cli.runtime_provider import resolve_runtime_provider
         from run_agent import AIAgent
 
-        runtime = resolve_runtime_provider()
+        # Explicit Ollama provider — do NOT use resolve_runtime_provider()
+        # which may return 'local' (unsupported). The overnight loop always
+        # runs against local Ollama inference.
+        _model = os.environ.get("OVERNIGHT_MODEL", "hermes4:14b")
+        _base_url = os.environ.get("OVERNIGHT_BASE_URL", "http://localhost:11434/v1")
+        _provider = "ollama"
         
         buf_out = io.StringIO()
         buf_err = io.StringIO()
 
         agent = AIAgent(
-            model=runtime.get("model", "hermes4:14b"),
-            api_key=runtime.get("api_key"),
-            base_url=runtime.get("base_url"),
-            provider=runtime.get("provider"),
-            api_mode=runtime.get("api_mode"),
+            model=_model,
+            base_url=_base_url,
+            provider=_provider,
+            api_mode="chat_completions",
             max_iterations=MAX_TURNS_PER_TASK,
             quiet_mode=True,
             ephemeral_system_prompt=SYSTEM_PROMPT,
@@ -134,9 +137,9 @@ def run_task(task: dict, run_number: int) -> dict:
         result["elapsed_seconds"] = round(elapsed, 2)
         result["response"] = conv_result.get("final_response", "")[:2000]
         result["session_id"] = getattr(agent, "session_id", None)
-        result["provider"] = runtime.get("provider")
-        result["base_url"] = runtime.get("base_url")
-        result["model"] = runtime.get("model")
+        result["provider"] = _provider
+        result["base_url"] = _base_url
+        result["model"] = _model
         result["tool_calls_made"] = conv_result.get("tool_calls_count", 0)
         result["status"] = "pass" if conv_result.get("final_response") else "empty"
         result["stdout"] = buf_out.getvalue()[:500]