feat(identity): weighted evidence table, sequel numbers, generic-name guard (ID-2)

Configurable DEFAULT_MATCH_WEIGHTS; Chinese/English names both count and
corroborate; Chapter/Part/第N章 sequel conflicts reject; missing season
penalised; category words and single-word aliases colliding in the pool
cannot confirm alone; alias-only hits need year or second-script support;
same-level ties broken by exact year then matched name scripts.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

packages/domain/src/identity/index.ts

@@ -1,8 +1,11 @@
 export {
+  DEFAULT_MATCH_WEIGHTS,
   type EvidenceLevel,
   type IdentityCandidate,
   type IdentityResolution,
   type MatchOptions,
+  type MatchWeights,
+  poolGenericNames,
   queryTitles,
   type RankedCandidate,
   rankCandidates,
@@ -12,5 +15,6 @@ export {
   type TypeMatch,
   type YearMatch,
 } from "./match.ts";
-export { normalizeTitle, stripSeasonSuffix } from "./normalize.ts";
+export { isGenericAliasName, normalizeTitle, stripSeasonSuffix } from "./normalize.ts";
+export { sequelNumbers } from "./sequel.ts";
 export { TRAD_TO_SIMP, toSimplified } from "./zh-map.ts";