Glue code for fgdb metadata

[jackrosacker]

What this PR does

Adds a unified dcpy lifecycle package esri write_metadata CLI command that writes Esri-format metadata XML into both shapefiles and geodatabases from product-metadata YAML. Previously there was no GDB write path; the shapefile path was a standalone command in shapefiles.py that is now removed.

Key changes

• write_metadata CLI: single command for both file types. GDB layer is inferred automatically for single-layer GDBs via fgdb.resolve_layer; required explicitly for multi-layer GDBs and shapefiles.
• Per-layer column overrides: File.layers / GdbLayerOverrides added to the metadata model so GDB entries in metadata.yml can declare per-layer column overrides, merged at write time via calculate_layer_dataset_metadata.
• Esri type overrides: format-specific types (String, SmallInteger, etc.) go in column.custom["fgdb_data_type"] / custom["shp_data_type"] rather than data_type.
• Cleanup: old shapefile write command removed; low-level metadata helpers moved to esri_metadata.py; tests reorganized to match.

Also of note

There are a bunch of complementary changes to the pluto YAML in the product-metadata repo. Since that repo has been archived, I plan to get this repo merged, and then will transfer the p-m edits directly in a new PR. Until then, the YAML changes can be seen in the test cases.

resolves #2303

fyi @alexrichey - I may need your help with all of the merge conflicts associated with this PR!

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.70%. Comparing base (ad1d69b) to head (2043754).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
dcpy/lifecycle/package/shapefiles.py	50.00%	3 Missing and 2 partials ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
dcpy/lifecycle/package/shapefiles.py	87.17% <50.00%> (-5.98%)	⬇️

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[alexrichey]

Looks great!