feat(monitoring): add Redis exporter + Sentry docs to deployment guide

- Add redis-exporter container to docker-compose (oliver006/redis_exporter, 32MB)
- Add Redis scrape target to Prometheus config
- Add 4 Redis alert rules: RedisDown, HighMemory, HighConnections, RejectedConnections
- Document Step 19b (Sentry Error Tracking) in Hetzner deployment guide
- Document Step 19c (Redis Monitoring) in Hetzner deployment guide
- Update resource budget and port reference tables

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

app/modules/dev_tools/static/admin/js/components.js

@@ -712,4 +712,4 @@ function adminComponents() {
     };
 }
 
-componentsLog.info('Components module loaded');
+componentsLog.info('Components module loaded');

app/modules/dev_tools/static/admin/js/icons-page.js

@@ -219,4 +219,4 @@ function adminIcons() {
     };
 }
 
-iconsLog.info('Icons page module loaded');
+iconsLog.info('Icons page module loaded');

app/modules/dev_tools/static/admin/js/testing-hub.js

@@ -122,4 +122,4 @@ function adminTestingHub() {
     };
 }
 
-testingLog.info('Testing hub module loaded');
+testingLog.info('Testing hub module loaded');