# Refactor workflow–logic function interaction
## Why
Workflow code steps and standalone logic functions shared the same build
layer and DB layer, which blurred two use cases: code steps belong to a
workflow version; standalone functions are deployable units. That made
workflow code steps harder to own and evolve.
## Goal
Treat code steps as **workflow-owned**: build and run them in workflow
context, and expose workflow-scoped APIs so the editor can load, test,
and save code step source without going through the generic
logic-function layer.
# Introduction
In preparation of the workspace agnostic builder, we're migrating
`FlatEntityMaps` to be universal identifier oriented and based
As in the builder context there're won't be any ids at all
Please also note that the FlatEntity is a UniversalFlatEntity superset
From
```ts
import { type SyncableFlatEntity } from 'src/engine/metadata-modules/flat-entity/types/flat-entity-from.type';
export type FlatEntityMaps<T extends SyncableFlatEntity> = {
byId: Partial<Record<string, T>>;
idByUniversalIdentifier: Partial<Record<string, string>>;
universalIdentifiersByApplicationId: Partial<Record<string, string[]>>;
};
```
To
```ts
export type FlatEntityMaps<
T extends SyncableFlatEntity | UniversalSyncableFlatEntity,
> = {
byUniversalIdentifier: Partial<Record<string, T>>;
universalIdentifierById: Partial<Record<string, string>>;
universalIdentifiersByApplicationId: Partial<Record<string, string[]>>; // this might make more sense to be migrated to universalIdentifiersByApplicationUniversalIdentifier but it's the main topic of this PR
};
```
## Low level maps tools
Had to refactor find | create | delete | replace | find-many | get-sub
tools ( through mutations and or throw equivalent )
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
## Summary
- Remove `latestVersion` and `publishedVersions` columns from
`LogicFunction` entity
- Remove version parameter from logic function execution, build, and
source code retrieval
- Update all related services, DTOs, utilities, and tests
- Add database migration to drop the version columns
