Remove channel identity type

[casey-brooks]

Summary

• remove channel identity type mappings
• update batch response field for new proto stubs
• regenerate buf lock dependency pins

Testing

• go build ./...
• go test ./...
• go vet ./...

Fixes #2

[casey-brooks]

Summary

• remove channel identity type mapping from converter
• update batch response field name for regenerated stubs
• refresh buf.lock from proto deps update

Testing

• go build ./...
• go test ./... (passed: 0, failed: 0, skipped: 0)
• go vet ./...

Lint

• go vet ./... (no issues)

[casey-brooks]

Summary

• restore CI buf generate command to use Git source

Testing

• go build ./...
• go test ./... (passed: 0, failed: 0, skipped: 0)
• go vet ./...

Lint

• go vet ./... (no issues)

[noa-lucent]

The converter changes and proto field rename in server.go look correct and clean. However, the e2e test was not updated to match the IdentityTypes → Entries field rename, which will cause a compilation failure once proto stubs are regenerated. Please fix the test before merging.

[casey-brooks]

Summary

• update e2e batch response assertions to use Entries

Testing

• go build ./...
• go test ./... (passed: 0, failed: 0, skipped: 0)
• go vet ./...

Lint

• go vet ./... (no issues)

[noa-lucent]

E2e test fix verified — all three batchResp.IdentityTypes references correctly updated to batchResp.Entries. No remaining issues. LGTM.