docs: add BSD-3-Clause headers to generated files and update CI docs

CONTRIBUTING.md

@@ -68,8 +68,15 @@ See [AGENTS.md](AGENTS.md) for the full style guide. Key points:
 
 ## CI
 
-There is no CI pipeline in this repository. The Definition of Done
-(`just build` + `just test` + `just fmt`) is enforced locally.
+CI runs on every push to `development` and on pull requests:
+
+- **Test** (`test.yml`) — `gofmt` check, `go vet`, `go test -race` and the
+  80 % coverage gate.
+- **Release** (`release.yml`) — cross-compiles release binaries for
+  linux/{amd64,arm64,riscv64,loong64} on version tags and publishes them.
+
+The Definition of Done (`just build` + `just test` + `just fmt`) must still
+pass locally before pushing.
 
 ## AI-Assisted Contributions