feat(api): resources routes + dependencies + change history

Add lib/api/routes/resources.js: CRUD scoped to space; dependency
add/list/remove (cross-space attempts mapped to 409 conflict via the
composite FK); source-docs index per resource; change history via
audit.listForEntity.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

tests/api/resources.test.js

@@ -0,0 +1,73 @@
+import { describe, it, expect, beforeAll, beforeEach } from 'vitest';
+import request from 'supertest';
+import { setup } from './helpers.js';
+import * as spaces from '../../lib/db/repos/spaces.js';
+
+let app, ownerHeaders, space, otherSpace;
+const owner = { kind: 'user', id: null };
+
+async function makeResource(spaceId, slug) {
+  const res = await request(app).post(`/api/spaces/${spaceId}/resources`).set(ownerHeaders)
+    .send({ slug, name: slug, runtime_type: 'lxc' });
+  return res.body;
+}
+
+beforeAll(async () => { ({ app, ownerHeaders } = await setup()); });
+beforeEach(async () => {
+  space      = await spaces.create({ slug: `s-${Date.now()}-${Math.random().toString(36).slice(2,5)}`, name: 'S'  }, owner);
+  otherSpace = await spaces.create({ slug: `o-${Date.now()}-${Math.random().toString(36).slice(2,5)}`, name: 'O' }, owner);
+});
+
+describe('resources routes', () => {
+  it('POST creates and lists by space', async () => {
+    const r = await makeResource(space.id, 'svc');
+    expect(r.runtime_type).toBe('lxc');
+    const list = await request(app).get(`/api/spaces/${space.id}/resources`).set(ownerHeaders);
+    expect(list.body.length).toBe(1);
+  });
+
+  it('PATCH updates status', async () => {
+    const r = await makeResource(space.id, 'svc2');
+    const res = await request(app).patch(`/api/resources/${r.id}`).set(ownerHeaders)
+      .send({ status: 'running' });
+    expect(res.body.status).toBe('running');
+  });
+
+  it('POST dependencies rejects self-dependency', async () => {
+    const r = await makeResource(space.id, 'self');
+    const res = await request(app).post(`/api/resources/${r.id}/dependencies`).set(ownerHeaders)
+      .send({ depends_on: r.id });
+    expect(res.status).toBe(400);
+  });
+
+  it('POST dependencies rejects cross-space → 409', async () => {
+    const a = await makeResource(space.id, 'a');
+    const b = await makeResource(otherSpace.id, 'b');
+    const res = await request(app).post(`/api/resources/${a.id}/dependencies`).set(ownerHeaders)
+      .send({ depends_on: b.id });
+    expect(res.status).toBe(409);
+    expect(res.body.error.code).toBe('conflict');
+  });
+
+  it('list + remove dependency', async () => {
+    const a = await makeResource(space.id, 'svc-a');
+    const b = await makeResource(space.id, 'svc-b');
+    await request(app).post(`/api/resources/${a.id}/dependencies`).set(ownerHeaders)
+      .send({ depends_on: b.id, kind: 'hard' });
+    const list = await request(app).get(`/api/resources/${a.id}/dependencies`).set(ownerHeaders);
+    expect(list.body.length).toBe(1);
+    expect(list.body[0].depends_on).toBe(b.id);
+    const del = await request(app).delete(`/api/resources/${a.id}/dependencies/${b.id}`).set(ownerHeaders);
+    expect(del.status).toBe(204);
+    const after = await request(app).get(`/api/resources/${a.id}/dependencies`).set(ownerHeaders);
+    expect(after.body.length).toBe(0);
+  });
+
+  it('GET /:id/changes returns audit history', async () => {
+    const r = await makeResource(space.id, 'audited');
+    await request(app).patch(`/api/resources/${r.id}`).set(ownerHeaders).send({ status: 'running' });
+    const res = await request(app).get(`/api/resources/${r.id}/changes`).set(ownerHeaders);
+    expect(res.status).toBe(200);
+    expect(res.body.length).toBe(2); // create + update
+  });
+});