fix(workflow-executor): accept orchestrator wire form for composite columnType [PRD-464]

[ShohanRahman]

Summary

• ColumnTypeSchema rejected the orchestrator's wire-form representation of composite column types ({ fields: [{ field, type }] }), breaking any workflow targeting a collection that contains a composite/embedded field — e.g. an embedded field declared with columnType: { data: "String" }.
• Add a fourth union branch that accepts the wire form and .transforms it back to the canonical Record<string, ColumnType> shape so downstream consumers see no difference.
• Add Jest coverage for native record form, single-entry wire form, multi-entry wire form, and nested-composite wire form.

Bug

Step dispatch failed with:

Run <runId> mapper produced invalid AvailableStepExecution — fields.N.type: Invalid input
ZodError [...] path: ["fields", N, "type"]

Stack: ReadRecordStepExecutor.getCollectionSchema → ForestServerWorkflowPort.callPort → CollectionSchemaSchema.parse.

Test plan

• yarn workspace @forestadmin/workflow-executor test — 914 tests pass, 4 new tests in forest-server-workflow-port.test.ts
• Smoke-test a workflow on a collection with an embedded computed field

fixes PRD-464

🤖 Generated with Claude Code

Note

Accept orchestrator wire form for composite columnType in workflow executor

• Extends ColumnTypeSchema in collection.ts to accept composite types in the orchestrator's wire form { fields: [{ field, type }] }, in addition to the native record form.
• Adds a transform that normalizes the wire form into a record/object shape, including nested composite types.
• Adds four test cases in forest-server-workflow-port.test.ts covering native record form, single- and multi-entry wire form, and nested wire form composites.

🖇️ Linked Issues

Relates to PRD-464.

^{Macroscope summarized de33f2a.}

[linear-code]

PRD-464

[qltysh]

Coverage Impact

Unable to calculate total coverage change because base branch coverage was not found.

Modified Files with Diff Coverage (1)

Rating	File	% Diff	Uncovered Line #s
	packages/workflow-executor/src/types/validated/collection.ts	100.0%
	Total	100.0%

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