feat(mapping): centralize domain <-> contracts mappings (B5)

New @umt/mapping (depends on domain + contracts only): download status + pause reason,
evidence level / media kind, identity resolution status, slot status / spec columns /
evaluation, ParsedRelease <-> source_release.parsed, SiteRelease <-> source_release,
PathBinding, OrganizePlan -> organization_record / file results / organize.plan output.
Tables are Record<union, ...> so adding a value on either side fails typecheck or tests.

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

packages/mapping/src/evidence.ts

@@ -0,0 +1,73 @@
+import type { EvidenceLevel as ContractEvidenceLevel, ExternalEntityType, MediaKind } from "@umt/contracts";
+import type { Confidence, EvidenceLevel as DomainMatchLevel } from "@umt/domain";
+
+// 证据等级:domain 的 EvidenceLevel 实为"匹配等级"(含 rejected),这里以 DomainMatchLevel 称呼;
+// contracts 的 EvidenceLevel 是落库/展示用的证据等级(含 manual、needs_review)。
+
+export type { DomainMatchLevel };
+
+const LEVEL_TO_CONTRACT: Record<DomainMatchLevel, ContractEvidenceLevel | null> = {
+  rule_confirmed: "rule_confirmed",
+  multi_evidence: "multi_evidence",
+  needs_confirm: "needs_review",
+  // 被否决的候选不形成证据记录
+  rejected: null,
+};
+
+const LEVEL_TO_DOMAIN: Record<ContractEvidenceLevel, Confidence> = {
+  // 人工确认按最强规则证据参与排序
+  manual: "rule_confirmed",
+  rule_confirmed: "rule_confirmed",
+  multi_evidence: "multi_evidence",
+  needs_review: "needs_confirm",
+};
+
+export const DOMAIN_MATCH_LEVELS = Object.keys(LEVEL_TO_CONTRACT) as DomainMatchLevel[];
+
+/** domain 匹配等级 / 解析置信度 → contracts 证据等级;rejected 返回 null */
+export function toContractEvidenceLevel(level: DomainMatchLevel): ContractEvidenceLevel | null {
+  return LEVEL_TO_CONTRACT[level];
+}
+
+export function toDomainConfidence(level: ContractEvidenceLevel): Confidence {
+  return LEVEL_TO_DOMAIN[level];
+}
+
+// ── 媒体类型:domain 只分 movie / tv ──
+
+export type DomainMediaType = "movie" | "tv";
+
+const MEDIA_TO_DOMAIN: Record<MediaKind, DomainMediaType | null> = {
+  movie: "movie",
+  series: "tv",
+  // 综艺按剧集规则(季/期)处理
+  variety: "tv",
+  collection: null,
+  other: null,
+};
+
+export function toDomainMediaType(kind: MediaKind): DomainMediaType | null {
+  return MEDIA_TO_DOMAIN[kind];
+}
+
+/** domain → contracts 媒体类型;tv 默认落为 series,综艺由调用方按来源分类显式指定 */
+export function toContractMediaKind(t: DomainMediaType, opts: { variety?: boolean } = {}): MediaKind {
+  return t === "movie" ? "movie" : opts.variety ? "variety" : "series";
+}
+
+const ENTITY_TYPE_TO_DOMAIN: Record<ExternalEntityType, DomainMediaType | null> = {
+  movie: "movie",
+  tv: "tv",
+  season: null,
+  episode: null,
+  collection: null,
+  person: null,
+};
+
+export function toDomainEntityType(t: ExternalEntityType): DomainMediaType | null {
+  return ENTITY_TYPE_TO_DOMAIN[t];
+}
+
+export function toContractEntityType(t: DomainMediaType): ExternalEntityType {
+  return t;
+}