Rebuild: fresh AdonisJS 7 API app on Postgres

The rebuild branch starts over (REBUILD.md): the API starter kit, with
Postgres instead of SQLite (its own database, DB_SEARCH_PATH for a
shared one in development) and the #lib alias. Phase 1's code is
imported from the current app module by module.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lib/yenc/errors.ts

@@ -1,16 +0,0 @@
-export class YencError extends Error {
-  constructor(message: string) {
-    super(message)
-    this.name = 'YencError'
-  }
-}
-
-export class YencCrcError extends YencError {
-  constructor(
-    public readonly expected: string,
-    public readonly actual: string
-  ) {
-    super(`CRC32 mismatch: expected ${expected}, got ${actual}`)
-    this.name = 'YencCrcError'
-  }
-}