fix: use real cache key prefixes in mock and dynamic imports for CI compatibility

tests/unit/cwOpportunityService.test.ts

@@ -1,8 +1,8 @@
-import { describe, test, expect, mock, beforeEach } from "bun:test";
+import { describe, test, expect, mock, beforeAll, beforeEach } from "bun:test";
 
 // ---------------------------------------------------------------------------
-// Top-level mocks — configured before the module is imported so the ESM
-// linker always sees the mocked version, regardless of Bun's module cache.
+// Top-level mocks — must be registered before any import of the service
+// module so the ESM linker resolves mocked dependencies.
 // ---------------------------------------------------------------------------
 
 const postMock = mock(() => Promise.resolve({ data: { id: 9001 } }));
@@ -22,11 +22,20 @@ mock.module("../../src/modules/cw-utils/opportunities/opportunities", () => ({
   opportunityCw: { update: updateMock },
 }));
 
-// Import AFTER mocks
-import {
-  submitTimeEntry,
-  syncOpportunityStatus,
-} from "../../src/services/cw.opportunityService";
+// ---------------------------------------------------------------------------
+// Dynamic import — use await import() inside beforeAll so the module is
+// loaded AFTER mock.module calls take effect. Static imports are hoisted
+// above top-level code in some Bun versions, defeating the mock.
+// ---------------------------------------------------------------------------
+
+let submitTimeEntry: typeof import("../../src/services/cw.opportunityService")["submitTimeEntry"];
+let syncOpportunityStatus: typeof import("../../src/services/cw.opportunityService")["syncOpportunityStatus"];
+
+beforeAll(async () => {
+  const mod = await import("../../src/services/cw.opportunityService");
+  submitTimeEntry = mod.submitTimeEntry;
+  syncOpportunityStatus = mod.syncOpportunityStatus;
+});
 
 // ---------------------------------------------------------------------------
 // Tests