feat: integrate GitHub Copilot providers across Hermes

Add first-class GitHub Copilot and Copilot ACP provider support across
model selection, runtime provider resolution, CLI sessions, delegated
subagents, cron jobs, and the Telegram gateway.

This also normalizes Copilot model catalogs and API modes, introduces a
Copilot ACP OpenAI-compatible shim, and fixes service-mode auth by
resolving Homebrew-installed gh binaries under launchd.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

tests/test_run_agent_codex_responses.py

@@ -49,6 +49,27 @@ def _build_agent(monkeypatch):
     return agent
 
 
+def _build_copilot_agent(monkeypatch, *, model="gpt-5.4"):
+    _patch_agent_bootstrap(monkeypatch)
+
+    agent = run_agent.AIAgent(
+        model=model,
+        provider="copilot",
+        api_mode="codex_responses",
+        base_url="https://api.githubcopilot.com",
+        api_key="gh-token",
+        quiet_mode=True,
+        max_iterations=4,
+        skip_context_files=True,
+        skip_memory=True,
+    )
+    agent._cleanup_task_resources = lambda task_id: None
+    agent._persist_session = lambda messages, history=None: None
+    agent._save_trajectory = lambda messages, user_message, completed: None
+    agent._save_session_log = lambda messages: None
+    return agent
+
+
 def _codex_message_response(text: str):
     return SimpleNamespace(
         output=[
@@ -244,6 +265,28 @@ def test_build_api_kwargs_codex(monkeypatch):
     assert "extra_body" not in kwargs
 
 
+def test_build_api_kwargs_copilot_responses_omits_openai_only_fields(monkeypatch):
+    agent = _build_copilot_agent(monkeypatch)
+    kwargs = agent._build_api_kwargs([{"role": "user", "content": "hi"}])
+
+    assert kwargs["model"] == "gpt-5.4"
+    assert kwargs["store"] is False
+    assert kwargs["tool_choice"] == "auto"
+    assert kwargs["parallel_tool_calls"] is True
+    assert kwargs["reasoning"] == {"effort": "medium"}
+    assert "prompt_cache_key" not in kwargs
+    assert "include" not in kwargs
+
+
+def test_build_api_kwargs_copilot_responses_omits_reasoning_for_non_reasoning_model(monkeypatch):
+    agent = _build_copilot_agent(monkeypatch, model="gpt-4.1")
+    kwargs = agent._build_api_kwargs([{"role": "user", "content": "hi"}])
+
+    assert "reasoning" not in kwargs
+    assert "include" not in kwargs
+    assert "prompt_cache_key" not in kwargs
+
+
 def test_run_codex_stream_retries_when_completed_event_missing(monkeypatch):
     agent = _build_agent(monkeypatch)
     calls = {"stream": 0}