feat(geolocation): implement address sanitization and caching to prev…

[Opulencechuks]

This PR closes #206
PR Description

Title: feat(geolocation): implement address sanitization and caching

Description:
This PR addresses security and cost concerns in the geocoding service by implementing input sanitization and result caching.

Key Changes:

• Sanitization: Added a sanitization layer to geocode_address that cleans and validates raw address strings, preventing injection and rejecting invalid inputs (e.g., pure numbers, too short/long).
• Caching: Integrated Redis caching (24h TTL) for geocoding results, significantly reducing redundant external API calls.
• Error Handling: Improved resilience for both API and cache failures.

How to Test:
1.Sanitization Check:

• Call the geocode_address method (or use the artisan profile update endpoint) with various "bad" strings like:
  • New York (should be trimmed)
  • 1234567 (should be rejected)
  • <script>alert(1)</script> (should be sanitized/rejected)
• Verify that invalid inputs return None without hitting the Nominatim API.
  2.Caching Check:
• Geocode a valid address (e.g., "Paris, France").
• Check Redis keys: keys geocode: should show a new entry.
• Geocode the same address again (case-insensitive, e.g., "paris, france").
• Verify that the second call is significantly faster and returns the cached result (no external API call made).
  3.Automated Test:
• Run the provided test script: python backend/scratch/test_geocoding_improvements.py (requires local environment setup).

Acceptance Criteria:

• Implement address validation before calling geocoding APIs.
• Add caching for common locations to reduce API costs.

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[gabito1451]

@Opulencechuks , U MIGHT WANT TO LOOK IN TO CI , ITS FAILING

[Opulencechuks]

please merge this issue