fix(qa): resolve A.1-A.7 code bugs and B.1-B.8 documentation issues

Code fixes:
- Rename "Coolify Admin" to "MCP Hub Admin" in endpoints
- Enrich list_projects with alias and endpoint URL
- Downgrade OAuth InvalidTokenError log from WARNING to DEBUG
- Add 7 missing health tools to /system/mcp endpoint (now 24 tools)
- Remove "Phase 7.2" from health monitor log
- Fix WP Advanced health check to pass with REST API only
- Downgrade duplicate alias warnings to INFO

Documentation fixes:
- Document SSE transport and Bearer auth requirement
- Recommend plugin-specific endpoints to save tokens
- Document plugin vs project endpoint differences
- WordPress plugin requirements for SEO/WP-CLI tools
- Docker socket mounting guide for WP-CLI
- Mark MASTER_API_KEY as recommended (auto-generates temp key)
- Env var naming convention with prefix table

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

core/health.py

@@ -1,5 +1,5 @@
 """
-Enhanced Health Monitoring System for MCP Server (Phase 7.2)
+Enhanced Health Monitoring System for MCP Server
 
 This module provides comprehensive health monitoring capabilities including:
 - Response time tracking
@@ -172,7 +172,7 @@ class HealthMonitor:
         # Request rate tracking (for requests per minute)
         self.request_timestamps: deque = deque(maxlen=1000)
 
-        logger.info("HealthMonitor initialized (Phase 7.2)")
+        logger.info("HealthMonitor initialized")
 
     def _setup_default_thresholds(self):
         """Setup default alert thresholds."""