Script API doesn't work in dev mode anymore

Scripting files in development mode (development_behavior_packs and development_resource_packs) do not run at all unless the addon is installed via the regular behavior_packs and resource_packs folders.

Steps to reproduce

1. Create a behavior pack using the development mode folder (development_behavior_packs)

2. Add a scripts section in the manifest and write a small script like:
   

   import { system, world } from '@minecraft/server';
   
   system.runInterval(() => {
   	world.sendMessage('Hello world!');
   }, 40);

3. Launch the world with the development pack activated

4. Observe that the script does not execute at all

5. Now move the same packs into the regular behavior_packs folder (install them like a standard addon)

6. Relaunch the world and the script works as expected

Expected result

• The message "Hello world!" is printed in chat every 2 seconds, regardless of whether the addon is installed in dev mode or not

Actual result

• Script is not run at all unless installed as a regular addon via behavior_packs

Notes

• This issue began occurring specifically with 1.21.100

• The world loads, but no error messages are shown

• This error critically affects addon creators - they must reinstall entire addon for every small script change to see if it works instead of just reloading the world, which significantly slows down development