feat: deploy jarca ledger network mcp service

- add Docker deployment for independent jarca-ledger container
- enable FastMCP streamable-http runtime configuration
- document dcy-013, REQ-019, and BAT-015 verification evidence
- update structure/runtime baselines and deployment runbook

tests/test_mcp_http_runtime.py

@@ -0,0 +1,46 @@
+from __future__ import annotations
+
+import importlib
+
+
+def test_mcp_runtime_config_defaults_to_stdio(monkeypatch):
+    monkeypatch.delenv("JARCA_MCP_TRANSPORT", raising=False)
+    monkeypatch.delenv("JARCA_MCP_HOST", raising=False)
+    monkeypatch.delenv("JARCA_MCP_PORT", raising=False)
+    monkeypatch.delenv("JARCA_MCP_STREAMABLE_HTTP_PATH", raising=False)
+
+    server = importlib.import_module("jarca_ledger_mcp.adapters.mcp.server")
+    config = server.get_mcp_runtime_config()
+
+    assert config.transport == "stdio"
+    assert config.host == "127.0.0.1"
+    assert config.port == 8000
+    assert config.streamable_http_path == "/mcp"
+
+
+def test_mcp_runtime_config_accepts_streamable_http_env(monkeypatch):
+    monkeypatch.setenv("JARCA_MCP_TRANSPORT", "streamable-http")
+    monkeypatch.setenv("JARCA_MCP_HOST", "0.0.0.0")
+    monkeypatch.setenv("JARCA_MCP_PORT", "8765")
+    monkeypatch.setenv("JARCA_MCP_STREAMABLE_HTTP_PATH", "/ledger-mcp")
+
+    server = importlib.import_module("jarca_ledger_mcp.adapters.mcp.server")
+    config = server.get_mcp_runtime_config()
+
+    assert config.transport == "streamable-http"
+    assert config.host == "0.0.0.0"
+    assert config.port == 8765
+    assert config.streamable_http_path == "/ledger-mcp"
+
+
+def test_mcp_runtime_config_rejects_invalid_transport(monkeypatch):
+    monkeypatch.setenv("JARCA_MCP_TRANSPORT", "websocket")
+
+    server = importlib.import_module("jarca_ledger_mcp.adapters.mcp.server")
+
+    try:
+        server.get_mcp_runtime_config()
+    except ValueError as exc:
+        assert "JARCA_MCP_TRANSPORT" in str(exc)
+    else:
+        raise AssertionError("invalid MCP transport should be rejected")