refactor: CI optimization, logging improvements, and codebase formatting (#456)

* fix(db): remove unique constraint on folder to support multi-channel agents

* ci: implement automated skill drift detection and self-healing PRs

* fix: align registration logic with Gavriel's feedback and fix build/test issues from Daniel Mi

* style: conform to prettier standards for CI validation

* test: fix branch naming inconsistency in CI (master vs main)

* fix(ci): robust module resolution by removing file extensions in scripts

* refactor(ci): simplify skill validation by removing redundant combination tests

* style: conform skills-engine to prettier, unify logging in index.ts and cleanup unused imports

* refactor: extract multi-channel DB changes to separate branch

Move channel column, folder suffix logic, and related migrations
to feat/multi-channel-db-v2 for independent review. This PR now
contains only CI/CD optimizations, Prettier formatting, and
logging improvements.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

skills-engine/__tests__/customize.test.ts

@@ -15,7 +15,11 @@ import {
   cleanup,
   writeState,
 } from './test-helpers.js';
-import { readState, recordSkillApplication, computeFileHash } from '../state.js';
+import {
+  readState,
+  recordSkillApplication,
+  computeFileHash,
+} from '../state.js';
 
 describe('customize', () => {
   let tmpDir: string;
@@ -116,7 +120,13 @@ describe('customize', () => {
     fs.writeFileSync(trackedFile, 'export const x = 2;');
 
     // Make the base file a directory to cause diff to exit with code 2
-    const baseFilePath = path.join(tmpDir, '.nanoclaw', 'base', 'src', 'app.ts');
+    const baseFilePath = path.join(
+      tmpDir,
+      '.nanoclaw',
+      'base',
+      'src',
+      'app.ts',
+    );
     fs.mkdirSync(baseFilePath, { recursive: true });
 
     expect(() => commitCustomize()).toThrow(/diff error/i);