Implement comprehensive rate limiting system and item spawn configuration

Major Features Added:
- Complete token bucket rate limiting for IRC commands and web interface
- Per-user rate tracking with category-based limits (Basic, Gameplay, Management, Admin, Web)
- Admin commands for rate limit management (\!rate_stats, \!rate_user, \!rate_unban, \!rate_reset)
- Automatic violation tracking and temporary bans with cleanup
- Global item spawn multiplier system with 75% spawn rate reduction
- Central admin configuration system (config.py)
- One-command bot startup script (start_petbot.sh)

Rate Limiting:
- Token bucket algorithm with burst capacity and refill rates
- Category limits: Basic (20/min), Gameplay (10/min), Management (5/min), Web (60/min)
- Graceful violation handling with user-friendly error messages
- Admin exemption and override capabilities
- Background cleanup of old violations and expired bans

Item Spawn System:
- Added global_spawn_multiplier to config/items.json for easy adjustment
- Reduced all individual spawn rates by 75% (multiplied by 0.25)
- Admins can fine-tune both global multiplier and individual item rates
- Game engine integration applies multiplier to all spawn calculations

Infrastructure:
- Single admin user configuration in config.py
- Enhanced startup script with dependency management and verification
- Updated documentation and help system with rate limiting guide
- Comprehensive test suite for rate limiting functionality

Security:
- Rate limiting protects against command spam and abuse
- IP-based tracking for web interface requests
- Proper error handling and status codes (429 for rate limits)

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

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

TODO.md

@@ -3,9 +3,9 @@
 This file tracks completed work, pending bugs, enhancements, and feature ideas for the PetBot project.
 
 ## 📊 Summary
-- **✅ Completed**: 14 items
-- **🐛 Bugs**: 1 item  
-- **🔧 Enhancements**: 5 items
+- **✅ Completed**: 17 items
+- **🐛 Bugs**: 0 items  
+- **🔧 Enhancements**: 3 items
 - **💡 Ideas**: 10 items
 - **📋 Total**: 30 items tracked
 
@@ -74,6 +74,24 @@ This file tracks completed work, pending bugs, enhancements, and feature ideas f
   - Updated help system with web interface integration
   - Enhanced project documentation for contributors
 
+- [x] **Implement automated database backup system**
+  - Complete backup management system with BackupManager class
+  - Automated scheduling with daily, weekly, and monthly backups
+  - Backup compression using gzip for space efficiency
+  - Retention policies (7 daily, 4 weekly, 12 monthly backups)
+  - IRC admin commands for backup management (!backup, !restore, !backups, !backup_stats, !backup_cleanup)
+  - Comprehensive testing suite and integration documentation
+  - Database integrity verification and safe restore procedures
+
+- [x] **IRC connection monitoring and auto-reconnect functionality**
+  - Advanced IRC connection manager with robust state tracking
+  - Health monitoring system with ping/pong heartbeat (60s intervals)
+  - Exponential backoff reconnection (1s to 5min with jitter)
+  - Connection statistics and monitoring commands (!status, !uptime, !ping, !reconnect, !connection_stats)
+  - Graceful error handling and recovery from network interruptions
+  - Comprehensive test suite covering 11 scenarios including edge cases
+  - Integration with existing bot architecture and module system
+
 ### Low Priority Completed ✅
 - [x] **Create CLAUDE.md file documenting development patterns and conventions**
   - Comprehensive development guide for AI-assisted development
@@ -85,32 +103,54 @@ This file tracks completed work, pending bugs, enhancements, and feature ideas f
 ## 🐛 KNOWN BUGS
 
 ### Medium Priority Bugs 🔴
-- [ ] **IRC connection monitoring and auto-reconnect functionality**
-  - Bot may lose connection without proper recovery
-  - Need robust reconnection logic with exponential backoff
-  - Monitor connection health and implement graceful reconnection
+- [x] **IRC connection monitoring and auto-reconnect functionality**
+  - ✅ Bot may lose connection without proper recovery
+  - ✅ Need robust reconnection logic with exponential backoff
+  - ✅ Monitor connection health and implement graceful reconnection
+  - ✅ Implemented comprehensive IRC connection manager with state tracking
+  - ✅ Added health monitoring with ping/pong system
+  - ✅ Created exponential backoff with jitter for reconnection attempts
+  - ✅ Added connection statistics and monitoring commands
+  - ✅ Comprehensive test suite with 11 test scenarios
 
 ---
 
 ## 🔧 ENHANCEMENTS NEEDED
 
 ### High Priority Enhancements 🟠
-- [ ] **Implement automated database backup system**
-  - Regular automated backups of SQLite database
-  - Backup rotation and retention policies
-  - Recovery procedures and testing
+- [x] **Implement automated database backup system**
+  - ✅ Regular automated backups of SQLite database (daily, weekly, monthly)
+  - ✅ Backup rotation and retention policies (7 daily, 4 weekly, 12 monthly)
+  - ✅ Recovery procedures and testing (restore with confirmation)
+  - ✅ Compression support (gzip) for space efficiency
+  - ✅ IRC admin commands for backup management
+  - ✅ Automated scheduling with cleanup
 
-- [ ] **Conduct security audit of web interface and IRC bot**
-  - Review all user input validation
-  - Audit authentication and authorization mechanisms
-  - Test for common web vulnerabilities (XSS, CSRF, injection attacks)
-  - Review IRC bot security practices
+- [x] **Conduct security audit of web interface and IRC bot**
+  - ✅ Review all user input validation
+  - ✅ Audit authentication and authorization mechanisms
+  - ✅ Test for common web vulnerabilities (XSS, CSRF, injection attacks)
+  - ✅ Review IRC bot security practices
+  - ✅ Identified 23 security vulnerabilities (5 critical, 8 high, 7 medium, 3 low)
+  - ✅ Created comprehensive security report in issues.txt
+
+- [ ] **Address security vulnerabilities from audit**
+  - Fix XSS vulnerabilities by implementing HTML escaping
+  - Add HTTP security headers (CSP, X-Frame-Options, etc.)
+  - Implement web interface authentication and authorization
+  - Fix path traversal vulnerabilities
+  - Add input validation and sanitization
+  - See issues.txt for complete list and remediation priorities
 
 ### Medium Priority Enhancements 🟡
-- [ ] **Add rate limiting to prevent command spam and abuse**
-  - Implement per-user rate limiting on IRC commands
-  - Web interface request throttling
-  - Graceful handling of rate limit violations
+- [x] **Add rate limiting to prevent command spam and abuse**
+  - ✅ Implemented comprehensive token bucket rate limiting system
+  - ✅ Per-user rate limiting on IRC commands with category-based limits
+  - ✅ Web interface request throttling with IP-based tracking
+  - ✅ Graceful handling of rate limit violations with user-friendly messages
+  - ✅ Admin commands for monitoring and management (!rate_stats, !rate_user, !rate_unban, !rate_reset)
+  - ✅ Automatic cleanup of old violations and expired bans
+  - ✅ Central configuration system with single admin user control
 
 - [ ] **Implement comprehensive error logging and monitoring system**
   - Structured logging with appropriate log levels