feat: refine metadata catalog workflows

backend/test/metadata-generation-models.test.ts

@@ -127,7 +127,7 @@ test("resolves only a configured selection for the later generation boundary", (
   expect(() => models.resolve("unknown-model")).toThrow(MetadataGenerationModelUnavailableError);
 });
 
-test("loads DeepSeek, GLM, and an explicit keyless Qwen endpoint from installation setup", () => {
+test("loads DeepSeek models, GLM, and an explicit keyless Qwen endpoint from installation setup", () => {
   const { installationFile, secretsFile } = metadataConfiguration(`metadataGeneration:
   default: glm-53
   models:
@@ -135,6 +135,10 @@ test("loads DeepSeek, GLM, and an explicit keyless Qwen endpoint from installati
       label: DeepSeek V4 Pro
       litellm: {provider: deepseek, model: deepseek-v4-pro}
       apiKeyEnv: DEEPSEEK_API_KEY
+    - id: deepseek-v4-flash
+      label: DeepSeek V4 Flash
+      litellm: {provider: deepseek, model: deepseek-v4-flash}
+      apiKeyEnv: DEEPSEEK_API_KEY
     - id: glm-53
       label: GLM 5.3
       litellm:
@@ -156,6 +160,7 @@ test("loads DeepSeek, GLM, and an explicit keyless Qwen endpoint from installati
   expect(models.catalog()).toEqual({
     models: [
       { id: "deepseek-v4-pro", label: "DeepSeek V4 Pro" },
+      { id: "deepseek-v4-flash", label: "DeepSeek V4 Flash" },
       { id: "glm-53", label: "GLM 5.3" },
       { id: "qwen-36", label: "Qwen 3.6" },
     ],