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Add obstore-backed Xarray reader for TiTiler-CMR#79

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negin513 wants to merge 6 commits intodevelopmentseed:developfrom
negin513:obsstore
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Add obstore-backed Xarray reader for TiTiler-CMR#79
negin513 wants to merge 6 commits intodevelopmentseed:developfrom
negin513:obsstore

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@negin513 negin513 commented Sep 29, 2025

Summary

This PR adds an obstore-based data access path for TiTiler-CMR/xarray workloads. It enables opening NetCDF (HDF5) and Zarr datasets over S3, HTTPS, and local file URLs without fsspec/s3fs, and wires in Earthdata S3 temporary credentials via earthaccess.

It removes fsspec/s3fs as hard dependencies and adds obstore as a dependency.

Note: VirtualiZarr is not included here. Also, we’re avoiding extra dependencies for now (particularly due to deployment limits in AWS Lambda).

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