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/router.ts

@@ -10,8 +10,9 @@ export function escapeXml(s: string): string {
 }
 
 export function formatMessages(messages: NewMessage[]): string {
-  const lines = messages.map((m) =>
-    `<message sender="${escapeXml(m.sender_name)}" time="${m.timestamp}">${escapeXml(m.content)}</message>`,
+  const lines = messages.map(
+    (m) =>
+      `<message sender="${escapeXml(m.sender_name)}" time="${m.timestamp}">${escapeXml(m.content)}</message>`,
   );
   return `<messages>\n${lines.join('\n')}\n</messages>`;
 }