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/config.py

@@ -1,14 +1,14 @@
 """
 Loki MCP Server - Configuration
 
-This is where we store settings for connecting to your Loki instance.
-We use environment variables with sensible defaults so you can override
-them without editing code.
+Settings for connecting to your Loki instance via its HTTP API.
+Uses environment variables with sensible defaults.
 
 Environment variables:
-    LOKI_URL        - Base URL for your Loki instance
-    LOKI_TIMEOUT    - Request timeout in seconds (default: 30)
-    LOKI_DEFAULT_LIMIT - Default number of log lines to return (default: 100)
+    LOKI_URL            - Base URL for your Loki instance
+    LOKI_TIMEOUT        - Request timeout in seconds (default: 30)
+    LOKI_DEFAULT_LIMIT  - Default number of log lines to return (default: 100)
+    LOKI_MCP_ENABLED    - Enable/disable integration (default: true)
 """
 
 import os
@@ -18,7 +18,7 @@ import os
 # Connection settings
 # ---------------------------------------------------------------------------
 
-# The URL where Loki is reachable. This goes through your Caddy reverse proxy.
+# The URL where Loki is reachable (through Caddy reverse proxy).
 LOKI_URL = os.getenv("LOKI_URL", "https://loki.apophisnetworking.net")
 
 # How long (seconds) to wait for Loki to respond before giving up.
@@ -29,10 +29,16 @@ LOKI_TIMEOUT = int(os.getenv("LOKI_TIMEOUT", "30"))
 # ---------------------------------------------------------------------------
 
 # How many log lines to return if the caller doesn't specify.
-# 100 is a good balance — enough to see what's happening, not so many
-# that it floods the response.
 DEFAULT_LIMIT = int(os.getenv("LOKI_DEFAULT_LIMIT", "100"))
 
 # Default time range for queries if none specified (in hours).
-# "1" means "show me the last hour of logs."
 DEFAULT_RANGE_HOURS = 1
+
+# ---------------------------------------------------------------------------
+# Feature flag
+# ---------------------------------------------------------------------------
+
+# Set to "false" to disable the integration without removing config
+LOKI_MCP_ENABLED = os.getenv(
+    "LOKI_MCP_ENABLED", "true"
+).lower() in ("true", "1", "yes")