feat(highlights): add channelDigests query

AGENTS.md

@@ -89,6 +89,7 @@ The migration generator compares entities against the local database schema. Ens
 - `src/directive/` - Custom GraphQL directives for auth, rate limiting, URL processing
 - **Docs**: See `src/graphorm/AGENTS.md` for comprehensive guide on using GraphORM to solve N+1 queries. GraphORM is the default and preferred method for all GraphQL query responses. Use GraphORM instead of TypeORM repositories for GraphQL resolvers to prevent N+1 queries and enforce best practices.
 - **GraphORM mappings**: Only add entries in `src/graphorm/index.ts` when you need custom mapping/fields/transforms or GraphQL type names differ from TypeORM entity names. For straightforward reads, keep GraphQL type names aligned with entities and use GraphORM without extra config.
+- **One GraphQL type per entity**: Before adding a new GraphQL type (and its GraphORM mapping) for an entity, check whether a type already maps `from` that entity. If so, reuse or extend that single type instead of introducing a parallel type with the same relations — duplicate types backed by the same entity (e.g. a `FooConfiguration` and a `Foo` both `from: 'Foo'`) should be consolidated. Prefer the entity-aligned name and point any nested field at it.
 - For GraphQL query resolvers, prefer `graphorm.query`, `graphorm.queryOne`, or `graphorm.queryPaginated` over custom TypeORM fetch/pagination code whenever GraphORM can express the query. Reach for manual TypeORM reads only when GraphORM genuinely cannot support the access pattern.
 - When adding subscriptions for GraphORM-backed types, prefer publishing a payload that already matches the existing GraphQL object shape instead of adding fallback field resolvers that override the normal GraphORM query path. If you must add a field resolver, preserve already-hydrated fields from query results.
 - When a GraphQL field must be nulled based on viewer permissions, define the rule in `src/graphorm/index.ts` as a shared transform/helper (for example `nullIfNotLoggedIn`). If a resolver cannot use GraphORM for the full query, reuse that GraphORM field mapping from the manual path instead of re-implementing the permission rule in a schema field resolver.

__tests__/highlights.ts

@@ -93,7 +93,15 @@ beforeEach(async () => {
   await con.getRepository(ArticlePost).delete(['h1', 'h2', 'h3', 'h4']);
   await con
     .getRepository(Source)
-    .delete(['a', 'b', 'c', 'backend_digest', 'career_digest']);
+    .delete([
+      'a',
+      'b',
+      'c',
+      'backend_digest',
+      'backend_digest_a',
+      'backend_digest_b',
+      'career_digest',
+    ]);
 });
 
 const saveCanonicalHighlights = (
@@ -269,6 +277,110 @@ describe('query channelConfigurations', () => {
   });
 });
 
+const CHANNEL_DIGEST_CONFIGURATIONS_QUERY = `
+  query ChannelDigestConfigurations {
+    channelDigestConfigurations {
+      frequency
+      source {
+        id
+        name
+        handle
+      }
+    }
+  }
+`;
+
+describe('query channelDigestConfigurations', () => {
+  const saveDigestSource = (id: string, name: string) =>
+    con.getRepository(Source).save({
+      id,
+      name,
+      image: `https://example.com/${id}.png`,
+      handle: id,
+      type: SourceType.Machine,
+      active: true,
+      private: false,
+    });
+
+  it('should return empty array when no digests exist', async () => {
+    const res = await client.query(CHANNEL_DIGEST_CONFIGURATIONS_QUERY);
+
+    expect(res.errors).toBeFalsy();
+    expect(res.data.channelDigestConfigurations).toEqual([]);
+  });
+
+  it('should return enabled digests ordered by channel and key with source resolved, excluding disabled', async () => {
+    await saveDigestSource('backend_digest_a', 'Backend Digest A');
+    await saveDigestSource('backend_digest_b', 'Backend Digest B');
+    await saveDigestSource('career_digest', 'Career Digest');
+
+    await con.getRepository(ChannelDigest).save([
+      {
+        key: 'career-digest',
+        channel: 'career',
+        sourceId: 'career_digest',
+        targetAudience: 'career changers',
+        frequency: 'weekly',
+        enabled: true,
+      },
+      {
+        key: 'backend-b',
+        channel: 'backend',
+        sourceId: 'backend_digest_b',
+        targetAudience: 'backend developers',
+        frequency: 'daily',
+        enabled: true,
+      },
+      {
+        key: 'backend-a',
+        channel: 'backend',
+        sourceId: 'backend_digest_a',
+        targetAudience: 'backend developers',
+        frequency: 'daily',
+        enabled: true,
+      },
+      {
+        key: 'backend-disabled',
+        channel: 'backend',
+        sourceId: 'backend_digest_disabled',
+        targetAudience: 'backend developers',
+        frequency: 'daily',
+        enabled: false,
+      },
+    ]);
+
+    const res = await client.query(CHANNEL_DIGEST_CONFIGURATIONS_QUERY);
+
+    expect(res.errors).toBeFalsy();
+    expect(res.data.channelDigestConfigurations).toEqual([
+      {
+        frequency: 'daily',
+        source: {
+          id: 'backend_digest_a',
+          name: 'Backend Digest A',
+          handle: 'backend_digest_a',
+        },
+      },
+      {
+        frequency: 'daily',
+        source: {
+          id: 'backend_digest_b',
+          name: 'Backend Digest B',
+          handle: 'backend_digest_b',
+        },
+      },
+      {
+        frequency: 'weekly',
+        source: {
+          id: 'career_digest',
+          name: 'Career Digest',
+          handle: 'career_digest',
+        },
+      },
+    ]);
+  });
+});
+
 describe('query postHighlights', () => {
   it('should return empty array when no highlights exist', async () => {
     const res = await client.query(QUERY, {

src/schema/highlights.ts

@@ -90,6 +90,11 @@ export const typeDefs = /* GraphQL */ `
     """
     channelConfigurations: [ChannelConfiguration!]!
 
+    """
+    Get all enabled channel digest configurations, ordered by channel and key
+    """
+    channelDigestConfigurations: [ChannelDigestConfiguration!]!
+
     """
     Get highlights for a channel, ordered by recency
     """
@@ -217,6 +222,19 @@ export const resolvers: IResolvers<unknown, BaseContext> = {
         },
         true,
       ),
+    channelDigestConfigurations: async (_, __, ctx: Context, info) =>
+      graphorm.query<GQLChannelDigestConfiguration>(
+        ctx,
+        info,
+        (builder) => {
+          builder.queryBuilder
+            .where(`"${builder.alias}"."enabled" = true`)
+            .orderBy(`"${builder.alias}"."channel"`, 'ASC')
+            .addOrderBy(`"${builder.alias}"."key"`, 'ASC');
+          return builder;
+        },
+        true,
+      ),
     postHighlights: async (_, args: { channel: string }, ctx: Context, info) =>
       graphorm.query(
         ctx,