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>

src/group-folder.test.ts

@@ -2,7 +2,11 @@ import path from 'path';
 
 import { describe, expect, it } from 'vitest';
 
-import { isValidGroupFolder, resolveGroupFolderPath, resolveGroupIpcPath } from './group-folder.js';
+import {
+  isValidGroupFolder,
+  resolveGroupFolderPath,
+  resolveGroupIpcPath,
+} from './group-folder.js';
 
 describe('group folder validation', () => {
   it('accepts normal group folder names', () => {
@@ -20,9 +24,9 @@ describe('group folder validation', () => {
 
   it('resolves safe paths under groups directory', () => {
     const resolved = resolveGroupFolderPath('family-chat');
-    expect(
-      resolved.endsWith(`${path.sep}groups${path.sep}family-chat`),
-    ).toBe(true);
+    expect(resolved.endsWith(`${path.sep}groups${path.sep}family-chat`)).toBe(
+      true,
+    );
   });
 
   it('resolves safe paths under data ipc directory', () => {