feat: implement Bluesky scan posts job and enhance user scanning

- Add new ScanPostsJob for scanning Bluesky posts
- Enhance ScanUserJob with improved error handling and logging
- Update BlueskyPost model with new fields and validation
- Add auxiliary tables for Bluesky posts
- Improve job base classes with better color logging
- Update specs with proper HTTP mocking patterns
- Add factory for BlueskyPost testing

.cursorignore

@@ -6,3 +6,27 @@ log
 public
 .bundle
 gems
+
+# Generated/build artifacts
+node_modules
+user_scripts/dist
+app/assets/builds
+vendor/javascript
+
+# Sorbet generated files
+sorbet/tapioca
+sorbet/rbi/gems
+sorbet/rbi/annotations
+sorbet/rbi/dsl
+
+# Configuration files with secrets
+config/credentials.yml.enc
+config/master.key
+
+# Lock files
+yarn.lock
+Gemfile.lock
+
+# Documentation
+TODO.md
+*.notes.md