fix: 3 schema bugs + add comprehensive testing documentation

Bug Fixes:
- auth.ts: Remove non-existent ap.updatedAt column
- subscriptions.ts: Add LIMIT 25 to prevent 136KB+ responses
- collections.ts: Remove documentStructure from list (use get for full)

Documentation:
- TESTING-GUIDE.md: Complete 164-tool reference with test status
- CONTINUE.md: Updated with verification status and MCP loading issue
- CHANGELOG.md: Document fixes and Round 1-2 test results

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

src/tools/collections.ts

@@ -36,6 +36,7 @@ export const collectionsTools: BaseTool<any>[] = [
         const { offset = 0, limit = 25, teamId } = args;
         validatePagination(offset, limit);
 
+        // Note: documentStructure excluded from list (too large) - use get_collection for full details
         let query = `
           SELECT
             c.id,
@@ -47,7 +48,6 @@ export const collectionsTools: BaseTool<any>[] = [
             c.index,
             c.permission,
             c."maintainerApprovalRequired",
-            c."documentStructure",
             c.sharing,
             c.sort,
             c."teamId",