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ci/frontend-builder (new): Node 24 + pnpm 10 + buf 1.55 + global @bufbuild/protoc-gen-es 2.4 + Playwright chromium runtime libs + ORAS. Used by KollectAI-ETL frontend CI to run TS proto codegen locally (buf.gen.yaml uses `local: protoc-gen-es`) instead of the rate-limited BSR remote-plugin path. ci/java-builder: added the standalone buf binary so `buf lint` runs in CI without an inline curl install. Backend Java codegen stays in the Maven build (protobuf-maven-plugin), so no protoc plugins are added to this image. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>