Add standalone D&D combat turn extraction

docs/internal/modules.md

@@ -96,6 +96,11 @@ provenance and are not treated as evidence for a consuming pipeline. The NPC
 codec owns the strict durable `dnd/npc-list` JSON boundary and exposes
 candidate versus approved encode/decode operations.
 
+The `internal/modules/dnd/codec/combatturns` package owns the durable
+`dnd/combat-turn-list` schema and candidate versus approved JSON boundary. It
+is available as a package contract but is not registered by the production D&D
+family registrar yet.
+
 ## Input Adapter
 
 ### `internal/modules/seriatim/input/transcript`
@@ -220,6 +225,19 @@ references for deterministic validation. It uses the shared campaign
 references only for disambiguation and does not consume the optional NPC
 registry slot. Its prompt and private response schema are package-owned.
 
+### `internal/modules/dnd/extract/combatturns`
+
+The combat extractor prepares one structured request per supplied chunk using
+the shared transcript, campaign-reference, and NPC-grounding prompt inputs. It
+maps the private response to `dnd.CombatTurnList`, assigns the current source
+identity, removes exact duplicate source ranges, and orders turns by valid
+source-document position while preserving malformed candidate fields for
+deterministic validators. Its prompt and private response schema are
+package-owned, and its prepared metadata and checkpoint fingerprints contain
+only prompt/schema/mapping identities plus an optional NPC registry digest.
+The package exposes typed registration for focused composition but is not in
+the production D&D registrar yet.
+
 ### `internal/modules/dnd/normalize/npcs`
 
 The NPC normalizer performs deterministic identity-aware consolidation in
@@ -323,6 +341,17 @@ canonical names, aliases, and cross-record ownership or canonical collisions.
 All are deterministic and expose the policy fingerprints used by the
 production chains.
 
+## D&D Combat Validators
+
+Combat shape validation owns required arrays, strings, nullable values, positive
+rounds, and supported enums. Combat source-reference validation defers invalid
+shape and checks source identity, unit existence, and range order. Combat
+source-relatedness defers invalid shape or ranges, combines overlapping cited
+units in document order, and emits at most one bounded advisory warning per
+turn for unrelated actor or declaration text. All three validators are
+deterministic and expose local policy fingerprints; they are package-complete
+but not yet in a production validator chain.
+
 ## Production Registration
 
 Production composition occurs through family registrars. The CLI allocates one