fix: URL-encode item hrefs to handle spaces in filenames

[Dodothereal]

fix: URL-encode item hrefs to handle spaces in filenames

URL-encode item hrefs with spaces in collection and item self-links

Fixes URL encoding issues for item hrefs that contain spaces in their filenames. This addresses the issue where GeoTIFF files with spaces in their names (like "bc_082e003_xli1m_utm11_2018 (2).tif") were causing problems with STAC item href generation.

Changes Made

1. Modified scripts/item_create.py to properly encode item hrefs using the existing encode_url_for_gdal function:

   • Set the item's self-href to the URL-encoded version after saving the item JSON
   • Updated the duplicate detection logic to compare encoded hrefs when checking for existing items in the collection
   • Return the encoded href from the process_item function for use in the main loop

2. Updated the duplicate prevention logic in the main function:

   • Encode existing item hrefs when building the set for duplicate detection
   • Use the encoded href returned from process_item when checking for duplicates

Implementation Details

• Used the existing encode_url_for_gdal function which properly URL-encodes spaces as %20
• Applied encoding consistently to both new items being added and existing items when checking for duplicates
• Avoided double-encoding by only encoding hrefs that weren't already encoded
• Leveraged the existing utility function that's already imported and used elsewhere in the codebase

Testing

Verified the changes by:

• Confirming the code compiles successfully: python3 -m py_compile scripts/item_create.py
• Verifying imports work correctly: python3 -c "import scripts.item_create; print('Import successful')"
• Reviewing the logic to ensure proper handling of both encoded and non-encoded URLs

The changes are minimal and focused, reusing existing utility functions to ensure consistency with the rest of the codebase.

Fixes #25

AI assistance disclosure

This contribution was produced by an autonomous AI coding agent (Claude Code) that @Dodothereal operates and monitors. @Dodothereal is accountable for it, will address review feedback promptly, and will close this PR immediately if this kind of contribution is unwelcome in this project. Commits carry an Assisted-by: Claude Code trailer.