Treat Venice as a tool-capable SOTA cloud provider (#1173)

Follow-up to the Venice provider PR. Wire api.venice.ai into the three
host allowlists so Venice behaves like the other paid OpenAI-compatible
clouds:

- agent_loop: add api.venice.ai to _API_HOSTS so the agent sends native
  OpenAI tool-call schemas (Venice supports function calling) instead of
  degrading to fenced-block parsing.
- teacher_escalation: add api.venice.ai to _SOTA_HOSTS so the escalation
  loop stays OFF for Venice (it's a paid top-tier API; no need to add
  teacher-model latency).
- webhook_routes: add venice to KNOWN_PROVIDERS so the sync chat webhook
  can auto-resolve base_url from provider=venice.

Tests: tests/test_venice_hosts.py pins tool-host matching + SOTA
classification for Venice; py_compile on touched modules.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/test_venice_hosts.py

@@ -0,0 +1,33 @@
+"""Venice host-allowlist behavior (follow-up to provider support).
+
+Venice (https://api.venice.ai/api/v1) is a paid, OpenAI-compatible cloud API
+with native tool-calling. These tests pin the three host-list integrations:
+  - agent loop sends native tool schemas to Venice (not fenced-block parsing),
+  - teacher escalation treats Venice as SOTA (loop OFF, no added latency).
+"""
+from src import agent_loop, teacher_escalation
+
+
+class TestAgentToolHosts:
+    def test_venice_in_api_hosts(self):
+        assert "api.venice.ai" in agent_loop._API_HOSTS
+
+    def test_venice_url_matches_api_host(self):
+        # Mirrors the runtime check: any(h in endpoint_url for h in _API_HOSTS)
+        url = "https://api.venice.ai/api/v1/chat/completions"
+        assert any(h in url for h in agent_loop._API_HOSTS)
+
+    def test_unknown_host_not_matched(self):
+        url = "https://example.invalid/v1/chat/completions"
+        assert not any(h in url for h in agent_loop._API_HOSTS)
+
+
+class TestTeacherEscalationSota:
+    def test_venice_is_sota_not_self_hosted(self):
+        assert teacher_escalation.is_self_hosted("https://api.venice.ai/api/v1/chat/completions") is False
+
+    def test_known_cloud_still_sota(self):
+        assert teacher_escalation.is_self_hosted("https://api.openai.com/v1") is False
+
+    def test_local_endpoint_still_self_hosted(self):
+        assert teacher_escalation.is_self_hosted("http://localhost:8000/v1") is True