Add DagRunType for operator

[henry3260]

Why

• The Execution API previously used the MANUAL run type for operator-triggered DAG runs, which caused ambiguity and made it difficult to distinguish between user-initiated and operator-initiated runs.

What

• Added OPERATOR to the DagRunType enum and updated all relevant code paths to use OPERATOR for operator-triggered DAG runs.
• Updated the Execution API route to strictly enforce OPERATOR as the only allowed run type.

Was generative AI tooling used to co-author this PR?

• Yes (please specify the tool below)

---

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[Copilot]

Pull request overview

Adds a new DAG run type (operator) so that DAG runs created via TriggerDagRunOperator/execution API can be distinguished from manual/UI/CLI triggers across Python, OpenAPI clients, and the UI.

Changes:

• Add DagRunType.OPERATOR = "operator" across core + generated client datamodels.
• Update the Execution API trigger endpoint to create operator-typed DagRuns and enforce allowed_run_types accordingly.
• Regenerate/update OpenAPI artifacts and UI rendering for the new run type.

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
task-sdk/src/airflow/sdk/api/datamodels/_generated.py	Adds operator to generated DagRunType for the Task SDK models.
airflow-ctl/src/airflowctl/api/datamodels/generated.py	Adds operator to generated DagRunType for airflowctl models.
airflow-core/src/airflow/utils/types.py	Adds DagRunType.OPERATOR in core enum.
airflow-core/src/airflow/api/common/trigger_dag.py	Allows callers to specify run_type (default manual) and validates against allowed_run_types.
airflow-core/src/airflow/api_fastapi/execution_api/routes/dag_runs.py	Execution API now triggers runs as run_type=operator and enforces operator run permission.
airflow-core/tests/unit/api_fastapi/execution_api/versions/head/test_dag_runs.py	Asserts triggered run uses DagRunType.OPERATOR and adds additional denial coverage.
airflow-core/tests/unit/api/common/test_trigger_dag.py	Adds unit test for operator run denial when only manual is allowed.
airflow-core/src/airflow/ui/src/components/RunTypeIcon.tsx	Displays an icon for run_type="operator".
airflow-core/src/airflow/ui/openapi-gen/requests/types.gen.ts	Updates generated TS union type to include operator.
airflow-core/src/airflow/ui/openapi-gen/requests/schemas.gen.ts	Updates generated TS schema enum to include operator.
airflow-core/src/airflow/api_fastapi/core_api/openapi/v2-rest-api-generated.yaml	Adds operator to DagRunType enum in generated OpenAPI.
airflow-core/src/airflow/api_fastapi/core_api/openapi/_private_ui.yaml	Adds operator to DagRunType enum in UI OpenAPI.

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[jason810496]

Thanks, LGTM overall!