refactor: remove all uncaged codename references

- Remove UNCAGED_CAS_DIR and UNCAGED_WORKFLOW_STORAGE_ROOT env var fallbacks
- Tests updated to use OCAS_DIR / UWF_STORAGE_ROOT
- All docs, READMEs, scripts, workflows, skills updated
- Only symlink migration code retains .uncaged paths (functional requirement)

Closes #12 (Phase 5 complete)

packages/cli/src/__tests__/thread-location.test.ts

@@ -19,9 +19,9 @@ describe("Thread and edge location integration", () => {
     await mkdir(storageRoot, { recursive: true });
     await mkdir(casDir, { recursive: true });
 
-    // Set UNCAGED_CAS_DIR for this test
-    originalEnv = process.env.UNCAGED_CAS_DIR;
-    process.env.UNCAGED_CAS_DIR = casDir;
+    // Set OCAS_DIR for this test
+    originalEnv = process.env.OCAS_DIR;
+    process.env.OCAS_DIR = casDir;
   }
 
   async function teardown() {
@@ -30,9 +30,9 @@ describe("Thread and edge location integration", () => {
     }
     // Restore original environment
     if (originalEnv === undefined) {
-      delete process.env.UNCAGED_CAS_DIR;
+      delete process.env.OCAS_DIR;
     } else {
-      process.env.UNCAGED_CAS_DIR = originalEnv;
+      process.env.OCAS_DIR = originalEnv;
     }
   }