Integrate MLS listings with property map and add smart sync

Property Map:
- Replace ACF-based property display with MLS database queries
- Use real lat/lng coordinates from MLS (100% coverage)
- Create property-card-mls.php template for MLS property cards
- Update AJAX handler to filter MLS properties

MLS Plugin Enhancements:
- Add 'wp mls run' smart sync command (auto-detects full/incremental/resume)
- Add database index migrations for lat/lng and composite search indexes
- Add comprehensive README.md documentation

Documentation:
- Update site README.md with sysadmin quick reference
- Add FEATURES_PENDING_12_15.md tracking client feature requests

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

wp-content/plugins/mls-by-hansonxyz/docs/CLAUDE.md

@@ -63,7 +63,13 @@ wp mls test auth
 wp mls status
 wp mls status rate-limits
 
-# Run property sync
+# SMART SYNC (recommended for automation)
+wp mls run                    # Auto-detect: full, incremental, or resume
+wp mls run --quiet            # Status messages only
+wp mls run --silent           # For cron (exit code only)
+wp mls run --verbose          # Full details
+
+# Manual sync commands (for more control)
 wp mls sync full [--dry-run] [--limit=N] [--verbose]    # Initial: Active/Pending only
 wp mls sync incremental [--dry-run] [--verbose]          # Replication: all changes
 wp mls sync resume --id=<sync_id>
@@ -171,7 +177,20 @@ The sync engine saves progress after each page:
 ### Recommended Cron Setup
 
 ```bash
-# Replication sync every 15 minutes (MLS Grid recommended)
+# Smart sync every 15 minutes (recommended - handles everything automatically)
+*/15 * * * * cd /var/www/html && wp mls run --silent --allow-root >> /var/log/mls-sync.log 2>&1
+```
+
+The `wp mls run` command automatically:
+- Runs full sync if no data exists
+- Runs incremental sync if data exists
+- Resumes failed/interrupted syncs
+- Aborts safely if another sync is running
+
+For manual control, use individual commands:
+
+```bash
+# Replication sync every 15 minutes
 */15 * * * * cd /var/www/html && wp mls sync incremental --allow-root >> /var/log/mls-sync.log 2>&1
 
 # Full re-sync weekly (Sunday 3am) - rebuilds from scratch