Add filegdb

[scottheather]

Summary

Adds ESRI File Geodatabase (.gdb) support to the Events import worker. Expects the File Geodatabase to be compressed in .zip file for upload (throws an error message when '.gdb' is uploaded).

Changes

• Detects .gdb directories inside ZIP archives, including archives with flattened FileGDB contents.
• Supports vector and raster geodatabase conversion through GDAL.
• Converts vector data to GeoJSONSeq and PMTiles.
• Routes raster data through the existing raster conversion pipeline (this function is useful to have, and simply re-uses our existing pipelines, BUT we don't have tests)
• Reuses shapefile sidecar validation for shapefile-backed vector content.
• Rejects: mixed raster/vector geodatabases, geodatabases without supported geospatial data, uncompressed .gdb uploads.
• Adds focused tests for validation, archive detection, and dispatch behavior.

Manual Tests/Validation

• Successfully imported a generated FileGDB containing 50 polygon features
• Verified generated GeoJSONSeq and PMTiles artifacts.

[codecov]

Codecov Report

❌ Patch coverage is 99.33333% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
tasks/events/src/transforms/geodatabase.ts	98.91%	1 Missing ⚠️

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