feat: Initial confluence-mcp server for realtime collaboration

Provides 8 MCP tools for Confluence Cloud:
- confluence_list_spaces, confluence_create_space
- confluence_search, confluence_get_page
- confluence_create_page, confluence_update_page
- confluence_get_comments, confluence_add_comment

Uses Confluence REST API v2 with basic auth.
Registered in Claude Code and mcp-proxy.

Refs: CF-935

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

node_modules/ajv/lib/refs/json-schema-2020-12/meta/content.json

@@ -0,0 +1,17 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://json-schema.org/draft/2020-12/meta/content",
+  "$vocabulary": {
+    "https://json-schema.org/draft/2020-12/vocab/content": true
+  },
+  "$dynamicAnchor": "meta",
+
+  "title": "Content vocabulary meta-schema",
+
+  "type": ["object", "boolean"],
+  "properties": {
+    "contentEncoding": {"type": "string"},
+    "contentMediaType": {"type": "string"},
+    "contentSchema": {"$dynamicRef": "#meta"}
+  }
+}