fix: Schema compatibility - emoji → icon column rename

Production Outline DB uses 'icon' column instead of 'emoji' for documents
and revisions. Fixed all affected queries:

- documents.ts: SELECT queries
- advanced-search.ts: Search queries
- analytics.ts: Analytics + GROUP BY
- export-import.ts: Export/import metadata
- templates.ts: Template queries + INSERT
- collections.ts: Collection document listing
- revisions.ts: Revision comparison

reactions.emoji kept unchanged (correct schema)

Tested: 448 documents successfully queried from hub.descomplicar.pt

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

package.json

@@ -1,6 +1,6 @@
 {
   "name": "mcp-outline-postgresql",
-  "version": "1.3.1",
+  "version": "1.3.2",
   "description": "MCP Server for Outline Wiki via PostgreSQL direct access",
   "main": "dist/index.js",
   "scripts": {