Add Cloudflare and Loki MCP server integrations

Features:
- Cloudflare Code Mode MCP: Exposes entire Cloudflare API (2,500+ endpoints)
  via remote MCP server at https://mcp.cloudflare.com/mcp
  * Two tools: search() to query OpenAPI spec, execute() to run JS code
  * Uses npx mcp-remote as stdio bridge
  * Auth via CLOUDFLARE_API_TOKEN as Bearer header

- Loki MCP Server: Log querying and analysis via Loki HTTP API
  * Query logs with LogQL syntax
  * Real-time log streaming support
  * Label introspection and metrics queries
  * Configurable via LOKI_URL environment variable

Technical changes:
- Created mcp_servers/cloudflare/ with config and connection logic
- Created mcp_servers/loki/ with HTTP client and MCP tool wrappers
- Added promtail-config-optimized.yaml for syslog ingestion config
- Updated .env.example with Cloudflare and Loki configuration templates

Both integrations:
- Use environment variables for configuration (no hardcoded credentials)
- Include feature flags (CLOUDFLARE_MCP_ENABLED, LOKI_MCP_ENABLED)
- Follow existing MCP server patterns for consistency

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

mcp_servers/loki/loki_mcp.py

@@ -0,0 +1,80 @@
+"""Loki MCP Server Integration.
+
+Manages the local Loki MCP server that exposes homelab log querying
+through MCP tools. Unlike Cloudflare (remote via mcp-remote), this runs
+a local Python MCP server that talks to Loki's HTTP API directly.
+
+Architecture:
+    Garvis → (stdio) → loki_server.py → HTTP → Loki (loki.apophisnetworking.net)
+
+Pattern mirrors cloudflare_mcp.py for consistency.
+"""
+
+import os
+import sys
+import logging
+from typing import Any, Dict, List
+
+logger = logging.getLogger(__name__)
+
+
+def _load_config() -> Dict[str, Any]:
+    """Load Loki MCP configuration from environment."""
+    from mcp_servers.loki.config import (
+        LOKI_URL,
+        LOKI_TIMEOUT,
+        LOKI_MCP_ENABLED,
+    )
+
+    return {
+        "enabled": LOKI_MCP_ENABLED,
+        "url": LOKI_URL,
+        "timeout": LOKI_TIMEOUT,
+    }
+
+
+def is_loki_enabled() -> bool:
+    """Check if the Loki MCP integration is enabled."""
+    config = _load_config()
+    if not config["enabled"]:
+        return False
+    if not config["url"]:
+        logger.warning("[Loki MCP] Enabled but LOKI_URL is not set")
+        return False
+    return True
+
+
+def get_loki_server_config() -> Dict[str, Any]:
+    """Build the MCP server configuration for Agent SDK registration.
+
+    Returns the config dict suitable for ClaudeAgentOptions.mcp_servers.
+    This runs a local Python MCP server via stdio (not mcp-remote).
+    """
+    # Path to the MCP server script
+    server_script = os.path.join(
+        os.path.dirname(__file__), "loki_server.py"
+    )
+
+    return {
+        "command": sys.executable,  # Use the same Python interpreter
+        "args": [server_script],
+        "env": {
+            "PATH": os.environ.get("PATH", ""),
+            "HOME": os.environ.get("HOME", os.environ.get("USERPROFILE", "")),
+            "APPDATA": os.environ.get("APPDATA", ""),
+            # Pass Loki config through to the subprocess
+            "LOKI_URL": os.environ.get("LOKI_URL", "https://loki.apophisnetworking.net"),
+            "LOKI_TIMEOUT": os.environ.get("LOKI_TIMEOUT", "30"),
+            "LOKI_DEFAULT_LIMIT": os.environ.get("LOKI_DEFAULT_LIMIT", "100"),
+        },
+    }
+
+
+# Tools exposed by the Loki MCP server.
+LOKI_TOOLS: List[str] = [
+    "loki_query",
+    "loki_labels",
+    "loki_label_values",
+    "loki_series",
+    "loki_health",
+]