Add comprehensive integration support for downstream flight planning applications

[Copilot]

This PR enhances the CIFP parser to provide better integration capabilities for downstream applications that require navigation data for flight planning. The existing parser already handled ARINC424 v18 format parsing and SQLite database creation, but lacked proper documentation and programmatic interfaces for easy integration.

Key Additions

📚 Comprehensive Documentation

• INTEGRATION.md - Complete integration guide with examples for common flight planning queries
• DATABASE_SCHEMA.md - Detailed documentation of all database tables, columns, and relationships
• Updated README.md with integration information and quick start guide

🔧 Programmatic API Interface

• cifp_api.pl - Simple Perl API for accessing parsed navigation data programmatically
• Provides convenient methods for common operations:
  • Airport information and runway data
  • SID/STAR/Approach procedure lookup
  • Navigation aid queries (VOR/DME, NDB)
  • Waypoint and fix resolution
  • Geographic area searches
  • JSON export for web APIs

📋 Integration Examples

• example_integration.pl - Comprehensive demonstration of integration patterns
• Shows real-world usage scenarios for flight planning applications
• Demonstrates proper table joins and coordinate handling

🧪 Testing & Validation

• test_integration.pl - Test suite to validate database structure and API functionality
• validate_integration.sh - Quick validation script for all integration components
• Ensures proper WGS84 coordinate conversion and database indexing

Example Usage

# Simple API usage
use CIFPDatabase;
my $api = CIFPDatabase->new('cifp-2312.db');

# Get airport procedures
my $approaches = $api->get_airport_approaches('KRIC');
my $procedure_steps = $api->get_procedure_steps('KRIC', 'ILS18L', '', 'APPROACH');

# Export as JSON for web applications  
print $api->to_json($approaches);

-- Complex flight planning queries with proper coordinate joins
SELECT p.SIDSTARApproachIdentifier, p.SequenceNumber, p.FixIdentifier,
       COALESCE(tw.waypointLatitude_WGS84, vor.vorLatitude_WGS84) AS Latitude
FROM "primary_P_F_base_Airport - Approach Procedures" p
LEFT JOIN "primary_P_C_base_Airport - Terminal Waypoints" tw 
    ON p.FixIdentifier = tw.waypointIdentifier
WHERE p.LandingFacilityIcaoIdentifier = 'KRIC';

Benefits for Downstream Applications

✅ Ready-to-use database with optimized indexes for flight planning queries
✅ WGS84 coordinates for direct GIS integration
✅ Comprehensive navigation data including airports, procedures, airways, and airspace
✅ Well-documented schema with examples for complex queries
✅ Simple API interface for programmatic access
✅ Production-ready with error handling and validation

Compatibility

• Maintains full backward compatibility with existing parser functionality
• All original features and command-line interfaces preserved
• No changes to core parsing logic or database structure
• Adds value without breaking existing workflows

Testing

Run the validation suite:

./validate_integration.sh           # Validate all components
./test_integration.pl cifp-YYMM.db  # Test with actual database
./example_integration.pl cifp-YYMM.db  # See integration examples

This enhancement makes the CIFP parser significantly more accessible for integration into flight planning systems, navigation applications, and GIS workflows while maintaining the robust parsing capabilities of the original implementation.

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