Standardized the grammar and spoken_word modules on a shared editorial_review validator

docs/architecture/validators.md

@@ -15,8 +15,6 @@ Built-in validator construction is package-owned under `internal/validators/<val
 - `internal/validators/spoken_form_plausibility`
 - `internal/validators/meaning_reversal_review`
 - `internal/validators/editorial_review`
-- `internal/validators/grammar_review`
-- `internal/validators/spoken_word_review`
 
 Registry and chain wiring stay in:
 - `internal/validators/registry.go`
@@ -67,10 +65,6 @@ Current 1.0 boundary:
   - checks for likely meaning reversal or semantic contradiction.
 - `editorial_review`
   - performs conservative editorial safety review.
-- `grammar_review`
-  - checks grammar-stage proposals for grammar-focused safety constraints.
-- `spoken_word_review`
-  - checks spoken-word-stage proposals for dysfluency-cleanup safety constraints.
 
 ## Built-in module chains
 
@@ -100,7 +94,7 @@ Current built-in chains resolved from `internal/validators/chains.go`:
   - `confidence_threshold`
   - `protected_terms`
   - `non_empty_corrected_text`
-  - `spoken_word_review`
+  - `editorial_review`
   - `meaning_reversal_review`
 
 - `grammar`
@@ -109,7 +103,7 @@ Current built-in chains resolved from `internal/validators/chains.go`:
   - `confidence_threshold`
   - `protected_terms`
   - `non_empty_corrected_text`
-  - `grammar_review`
+  - `editorial_review`
   - `meaning_reversal_review`
 
 ## Protected terms construction