refactor(api): remove redundant createJobFetchTypeSchema union

The union of jobTypeSchema and createJobFetchTypeSchema was a no-op since
JOB_COMMANDS already includes fetch-one, fetch-ready, and fetch-all. Remove
both derived schemas and use jobTypeSchema as the single source of truth.

Update tests to expect INVALID_ENUM_VALUE (more precise) instead of
VALIDATION_ERROR for invalid type field inputs.

Author: luandro

api-server/endpoint-schema-validation.test.ts

@@ -157,7 +157,7 @@ describe("Endpoint Schema Validation - POST /jobs", () => {
 
       if (result.success === false) {
         const formatted = formatZodError(result.error, "req_test_123");
-        validateZodErrorFormat(formatted, ErrorCode.VALIDATION_ERROR);
+        validateZodErrorFormat(formatted, ErrorCode.INVALID_ENUM_VALUE);
         expect(formatted.message).toBeDefined();
       }
     });
@@ -170,7 +170,7 @@ describe("Endpoint Schema Validation - POST /jobs", () => {
 
       if (result.success === false) {
         const formatted = formatZodError(result.error, "req_test_456");
-        validateZodErrorFormat(formatted, ErrorCode.VALIDATION_ERROR);
+        validateZodErrorFormat(formatted, ErrorCode.INVALID_ENUM_VALUE);
         expect(formatted.message).toBeDefined();
       }
     });
@@ -183,7 +183,7 @@ describe("Endpoint Schema Validation - POST /jobs", () => {
 
       if (result.success === false) {
         const formatted = formatZodError(result.error, "req_test_789");
-        validateZodErrorFormat(formatted, ErrorCode.VALIDATION_ERROR);
+        validateZodErrorFormat(formatted, ErrorCode.INVALID_ENUM_VALUE);
         // Zod reports the error - just verify it's formatted
         expect(formatted.message).toBeDefined();
       }
@@ -368,7 +368,7 @@ describe("Endpoint Schema Validation - GET /jobs", () => {
 
       if (result.success === false) {
         const formatted = formatZodError(result.error, "req_test_type");
-        validateZodErrorFormat(formatted, ErrorCode.VALIDATION_ERROR);
+        validateZodErrorFormat(formatted, ErrorCode.INVALID_ENUM_VALUE);
         expect(formatted.message).toBeDefined();
       }
     });

api-server/validation-schemas.test.ts

@@ -296,7 +296,7 @@ describe("Validation Schemas - Create Job Request", () => {
       const result = createJobRequestSchema.safeParse({});
       expect(result.success).toBe(false);
       if (!result.success && result.error) {
-        expect(result.error.issues[0].message).toContain("Invalid input");
+        expect(result.error.issues[0].message).toContain("Invalid option");
       }
     });
 

api-server/validation-schemas.ts

@@ -115,15 +115,6 @@ export const jobIdSchema = z
  * - Derived from JOB_COMMANDS keys (single source of truth)
  */
 export const jobTypeSchema = z.enum(VALID_JOB_TYPES as [string, ...string[]]);
-export const createJobFetchTypeSchema = z.enum([
-  "fetch-one",
-  "fetch-ready",
-  "fetch-all",
-]);
-export const createJobTypeSchema = z.union([
-  jobTypeSchema,
-  createJobFetchTypeSchema,
-]);
 
 /**
  * Job status validation schema
@@ -165,7 +156,7 @@ export const jobOptionsSchema = z
  */
 export const createJobRequestSchema = z
   .object({
-    type: createJobTypeSchema,
+    type: jobTypeSchema,
     options: jobOptionsSchema.optional(),
   })
   .superRefine((data, ctx) => {
@@ -191,7 +182,7 @@ export const createJobRequestSchema = z
  */
 export const jobsQuerySchema = z.object({
   status: jobStatusSchema.optional(),
-  type: createJobTypeSchema.optional(),
+  type: jobTypeSchema.optional(),
 });
 
 // =============================================================================
@@ -222,7 +213,7 @@ export const jobResultSchema = z.object({
  */
 export const jobSchema = z.object({
   id: z.string(),
-  type: createJobTypeSchema,
+  type: jobTypeSchema,
   status: jobStatusSchema,
   createdAt: z.string().datetime(),
   startedAt: z.string().datetime().nullable(),