refactor(server): builder pattern for GrpcServer, cache config, conditional NATS wiring

See merge request !910

perf(code-graph): complete ssa implementation with witness caching, SCC removal, copy propagation

Closes #457

See merge request !918

feat(code-graph): go and ruby DSL language specs

See merge request !917

refactor(indexer): remove code indexer disk cache

Closes #472

See merge request !919

fix(server): exit if no active schema version found

See merge request !921

refactor(e2e): move kubectl resources to helm charts

See merge request !920

refactor(e2e): declarative test runner with live logs

See merge request !923

feat(observability): add content resolution metrics for Gitaly calls

Closes #380

See merge request !927

perf(code-graph): fused pipeline, invariant-based skips, streaming reads

See merge request !922

fix(query-engine): serialize graph IDs as strings

Closes #60

See merge request !928

feat(formatters): add semver-based output format versioning

See merge request !925

fix(indexer): backfill code indexing during schema migration

Closes #473

See merge request !924

feat(server): parse session_id from JWT and add to tracing spans

See merge request !907

perf(code-graph): centralized linker state, and DuckDB conversion fixes

See merge request !929

feat(code-graph): custom pipeline support with PipelineOutput enum

See merge request !930

fix(indexer): checkpoint empty repositories as terminal

Closes #478

See merge request !933

feat(config): add deployment environment configuration

See merge request !934

ci(benchmark): skip benchmark jobs in forks

See merge request !935

## [0.28.0](v0.27.0...v0.28.0) (2026-04-17)

### Features

* **code-graph:** custom pipeline support with PipelineOutput enum ([11de4ecd](11de4ecd)) by Michael Usachenko
* **code-graph:** go and ruby DSL language specs ([4a7f0cce](4a7f0cce)) by Michael Usachenko
* **config:** add deployment environment configuration ([36b366a5](36b366a5)) by Michael Angelo Rivera
* **formatters:** add semver-based output format versioning ([4ad78f94](4ad78f94)) by Michael Angelo Rivera
* **observability:** add content resolution metrics for Gitaly calls ([28e8e5da](28e8e5da)) by Michael Usachenko
* **server:** parse session_id from JWT and add to tracing spans ([be80251e](be80251e)) by Ankit Panchal

### Fixes

* **indexer:** backfill code indexing during schema migration ([0970e23a](0970e23a)) by Bohdan Parkhomchuk
* **indexer:** checkpoint empty repositories as terminal ([55c949e4](55c949e4)) by Michael Angelo Rivera
* **query-engine:** serialize graph IDs as strings ([5b6f3896](5b6f3896)) by Michael Angelo Rivera
* **server:** exit if no active schema version found ([61dbf485](61dbf485)) by Bohdan Parkhomchuk

### Performance

* **code-graph:** centralized linker state, and DuckDB conversion fixes ([0ca3ff43](0ca3ff43)) by Michael Usachenko
* **code-graph:** complete ssa implementation with witness caching, SCC removal, copy propagation ([0d810b4c](0d810b4c)) by Michael Usachenko
* **code-graph:** fused pipeline, invariant-based skips, streaming reads ([a9dd5283](a9dd5283)) by Michael Usachenko

### Other

* **benchmark:** skip benchmark jobs in forks ([05d5f9fc](05d5f9fc)) by Bohdan Parkhomchuk
* **e2e:** declarative test runner with live logs ([7f03636a](7f03636a)) by Bohdan Parkhomchuk
* **e2e:** move kubectl resources to helm charts ([60f36487](60f36487)) by Bohdan Parkhomchuk
* **indexer:** remove code indexer disk cache ([a45ce754](a45ce754)) by Michael Angelo Rivera
* **server:** builder pattern for GrpcServer, cache config, conditional NATS wiring ([546f9799](546f9799)) by Michael Usachenko