Align internal documentation and maintained examples

docs/internal/stage-polish.md

@@ -1,17 +1,21 @@
 # Stage: polish
 
 ## Purpose
+
 Run Audita polishing on base transcript and produce polished transcript.
 
 ## Inputs
+
 - `transcripts/base.json`
 - `inputs/glossary.yml`
 
 ## Outputs
+
 - `transcripts/polished.json`
 - optional `artifacts/audita.report.json`
 
 ## Key Behavior
+
 - resolves base transcript from merge outputs/canonical fallback.
 - invokes Audita with configured model/module/runtime options.
 - validates processed transcript structure (`segments` array required).
@@ -19,5 +23,14 @@ Run Audita polishing on base transcript and produce polished transcript.
 - materializes canonical outputs; records logs/generated config and adapter metadata.
 
 ## Invariants
+
 - polished transcript schema validation is mandatory.
 - report output is config-gated.
+
+## Related Contracts And Tests
+
+- [Audita](../integrations/audita.md) owns subprocess, validation, and failure
+  semantics.
+- [Configuration](../config.md#pipeline) owns operator-selected Audita values.
+- Implementation and tests: `internal/stage/polish.go`,
+  `internal/stage/polish_test.go`