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/endpoints/config.py

@@ -99,7 +99,7 @@ ENDPOINT_CONFIGS = {
     # Mounted at "/" → /mcp (FastMCP adds /mcp automatically)
     EndpointType.ADMIN: EndpointConfig(
         path="/",
-        name="Coolify Admin",
+        name="MCP Hub Admin",
         description="Full administrative access to all tools and plugins",
         endpoint_type=EndpointType.ADMIN,
         plugin_types=[],  # Empty = all plugins