feat : gemspec logger conf & more

[keshav-k3]

Gemspec Metadata

• Enhanced: Added comprehensive metadata to gemspec
• Added: bug_tracker_uri, documentation_uri, wiki_uri, rubygems_mfa_required
• Security: Enhanced with MFA requirement for RubyGems

Logger Configuration

• Created: Centralized ActionWebPush::Logging module
• Fixed: Inconsistent logger patterns across 5 files
• Features: Smart fallback (config → Rails → STDOUT), consistent formatting

Batch Delivery Optimization

• Enhanced: Added configurable batch processing (batch_size: 100)
• Improved: Memory efficiency for large notification lists
• Features: Processes notifications in chunks to prevent
  system overload

Subscription Management

• Added: Comprehensive lifecycle management with callbacks
• Features: Activity tracking, analytics, dry_run cleanup
• Methods: mark_as_expired!, refresh_activity!, stats,
  endpoint_domain

Memory Leak in Rate Limiter

• Fixed: Automatic cleanup every 5 minutes prevents memory
  accumulation
• Added: Smart cleanup detection and memory monitoring
• Benefits: Prevents memory leaks in long-running processes