Removes the versioning system for logic functions (`latestVersion`,
`publishedVersions`) and simplifies the file storage structure.
### Changes
- Remove `publishOneLogicFunctionOrFail` and publishing logic from
workflow status updates
- Add `createLogicFunctionFromExistingLogicFunction` to duplicate logic
functions when creating draft workflow versions
- Update `createDraftStep` to create a new logic function copy instead
of referencing the same one
- Migrate file storage to v2 endpoints with
`applicationUniversalIdentifier`
- Unify path structure: source files at `source/workflow/{id}/`, built
files at `built-logic-function/workflow/{id}/`
- Store full paths in `sourceHandlerPath` and `builtHandlerPath` entity
fields
