feat: release notes

Each release can carry notes in Markdown, written before or after it
ships. A draft is generated from its finished tickets grouped by type, to
edit and copy from the releases page.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

libs/api/tracker/presenters/src/lib/graphql/release.resolver.ts

@@ -63,6 +63,29 @@ export class ReleaseResolver {
     return this.releases.progress(viewerOf(me), release.id);
   }
 
+  @ResolveField(() => String, {
+    description:
+      'A Markdown draft of the notes from its finished tickets, by type (not saved)',
+  })
+  notesDraft(
+    @CurrentUser() me: User | undefined,
+    @Parent() release: ReleaseReadModel,
+  ) {
+    return this.releases.notesDraft(viewerOf(me), release.id);
+  }
+
+  @Mutation(() => CommandResultGql, {
+    description:
+      'Write the release notes (Markdown; null removes them). Also after shipping.',
+  })
+  writeReleaseNotes(
+    @CurrentUser() me: User,
+    @Args('releaseId', { type: () => ID }) releaseId: string,
+    @Args('notes', { type: () => String, nullable: true }) notes: string | null,
+  ) {
+    return this.releases.writeNotes(me.id, releaseId, notes ?? null);
+  }
+
   @ResolveField(() => ReleaseBurnupGql, {
     description: 'Scope vs finished tickets, day by day',
   })

libs/api/tracker/presenters/src/lib/graphql/types.ts

@@ -285,6 +285,11 @@ export class ReleaseGql {
   @Field(() => String, { nullable: true }) targetDate!: string | null;
   @Field(() => ReleaseStatus) status!: ReleaseStatus;
   @Field(() => String, { nullable: true }) releasedAt!: string | null;
+  @Field(() => String, {
+    nullable: true,
+    description: 'What shipped, told for people (Markdown)',
+  })
+  notes!: string | null;
   @Field() createdAt!: string;
   @Field(() => Int) version!: number;
 }