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/init.ts

@@ -2,7 +2,12 @@ import { execSync } from 'child_process';
 import fs from 'fs';
 import path from 'path';
 
-import { BACKUP_DIR, BASE_DIR, BASE_INCLUDES, NANOCLAW_DIR } from './constants.js';
+import {
+  BACKUP_DIR,
+  BASE_DIR,
+  BASE_INCLUDES,
+  NANOCLAW_DIR,
+} from './constants.js';
 import { isGitRepo } from './merge.js';
 import { writeState } from './state.js';
 import { SkillState } from './types.js';
@@ -68,11 +73,7 @@ export function initNanoclawDir(): void {
   }
 }
 
-function copyDirFiltered(
-  src: string,
-  dest: string,
-  excludes: string[],
-): void {
+function copyDirFiltered(src: string, dest: string, excludes: string[]): void {
   fs.mkdirSync(dest, { recursive: true });
 
   for (const entry of fs.readdirSync(src, { withFileTypes: true })) {