chore: rename from task to step

[adityachoudhari26]

Summary by CodeRabbit

• Refactor

  • Updated workflow API terminology from "Task" to "Step" for improved clarity
  • Renamed workflow task references and fields to align with the new Step-based model

• New Features

  • Added support for string parameters in workflows

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[coderabbitai]

📝 Walkthrough

Walkthrough

This PR performs a systematic terminology shift across workflow-related OpenAPI schemas and generated types, renaming WorkflowTask to WorkflowStep and WorkflowTaskTemplate to WorkflowStepTemplate with corresponding field updates. It reintroduces the WorkflowStringParameter type to support string-typed workflow parameters.

Changes

Cohort / File(s)	Summary
Workflow schema definitions apps/workspace-engine/oapi/spec/schemas/workflows.jsonnet, apps/workspace-engine/oapi/openapi.json	Renamed WorkflowTask → WorkflowStep and WorkflowTaskTemplate → WorkflowStepTemplate. Updated property names: tasks → steps, workflowTaskTemplateId → workflowStepTemplateId. Updated required field lists and schema references. Introduced WorkflowStringParameter schema with name, type, and default fields.
Generated code apps/workspace-engine/pkg/oapi/oapi.gen.go	Updated generated type names and fields to match schema changes: WorkflowTask → WorkflowStep, WorkflowTaskTemplate → WorkflowStepTemplate with new JobAgent id field. Changed WorkflowTemplate.Tasks to Steps. Reintroduced WorkflowStringParameter and WorkflowStringParameterType types.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• PR #755: Introduces the initial workflow schema and generated types (WorkflowTask/TaskTemplate) that are being renamed and refined in this PR.
• PR #756: Modifies the same workflow-related OpenAPI declarations and types, with overlapping impact on WorkflowTask and related field definitions.

Poem

🐰 Tasks transform to Steps so fine,
Templates dance in new design,
Parameters string, the schema's bright,
Workflows evolve, hopping right! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The pull request title 'chore: rename from task to step' accurately summarizes the main change—renaming task-based constructs to step-based constructs across OpenAPI schemas, generated code, and related type definitions.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing touches

• 📝 Generate docstrings

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