feat(environments): cross-environment bulk operations

[markphelps]

Summary

This PR simplifies the v2 copy/apply API surface and extends BulkApplyResources to target multiple environments in a single request.

Changes

• Removed CopyResource from EnvironmentsService.
• Kept 2 RPCs:
  • CopyNamespace
  • BulkApplyResources
• Removed CopyResourceRequest / CopyResourceResponse proto messages.
• Extended BulkApplyResourcesRequest with environment_keys (optional target environments list).
• Extended BulkApplyNamespaceResult with environment_key so responses are unambiguous across environment+namespace targets.
• Updated server execution to apply operations across all target environments (Pro-gated), while preserving revision behavior for the primary environment_key path binding.
• Updated authz request generation for bulk apply to include all targeted environments.
• Regenerated environments artifacts:
  • rpc/v2/environments/environments.pb.go
  • rpc/v2/environments/environments_grpc.pb.go
  • rpc/v2/environments/environments.pb.gw.go
  • rpc/v2/environments/openapi.yaml
• Updated v2 SDK/UI copy flows and integration coverage to use BulkApplyResources instead of /resources/copy from earlier commits in this branch.

Naming Note

BulkApplyResources remains the RPC name because it supports non-copy operations (CREATE, UPDATE, DELETE, UPSERT) in addition to copy-like workflows.

Backward Compatibility

This is a v2 pre-release API shape change in PR scope (not yet live), so removing CopyResource and extending BulkApplyResources is intentional.

Additional Notes

• Branch: feat/cross-env-operations
• Latest commit: f0196732

[github-actions]

The latest Buf updates on your PR. Results from workflow Proto / proto-lint (pull_request).

Build	Format	Lint	Breaking	Updated (UTC)
✅ passed	✅ passed	✅ passed	✅ passed	Mar 28, 2026, 12:40 AM

[codecov]

Codecov Report

❌ Patch coverage is 71.47335% with 91 lines in your changes missing coverage. Please review.
✅ Project coverage is 61.00%. Comparing base (556cdbe) to head (dae7115).

Files with missing lines	Patch %	Lines
internal/server/environments/server.go	71.38%	63 Missing and 28 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##               v2    #5536      +/-   ##
==========================================
+ Coverage   60.70%   61.00%   +0.29%     
==========================================
  Files         141      141              
  Lines       14023    14339     +316     
==========================================
+ Hits         8513     8747     +234     
- Misses       4784     4823      +39     
- Partials      726      769      +43     

Flag	Coverage Δ
integrationtests	33.19% <22.57%> (-1.36%)	⬇️
unittests	53.27% <69.59%> (+1.66%)	⬆️

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