Fix: DAG output bug

[mrkaye97]

Description

Right now DAGs in the dashboard only show the output of one of the tasks, and the goal here is to show something similar to what you'd see after calling .run in the SDK

E.g.:

Type of change

• Bug fix (non-breaking change which fixes an issue)

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Project	Deployment	Actions	Updated (UTC)
hatchet-docs	Ready	Preview, Comment	Apr 27, 2026 9:19pm

[Copilot]

Pull request overview

This PR fixes an issue where DAG workflow runs in the dashboard only surfaced the output for a single task by persisting a per-task step name and using it to assemble a composite workflow-run output similar to SDK .run() results.

Changes:

• Add step_name to core (v1_task) and OLAP (v1_tasks_olap) schemas + migration.
• Propagate step_name through task creation paths and sqlc-generated queries/models.
• Update OLAP workflow-run read logic to build an output object keyed by step name using finished output payloads.

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
sql/schema/v1-olap.sql	Adds step_name column to OLAP tasks table schema.
sql/schema/v1-core.sql	Adds step_name column to core v1_task schema.
cmd/hatchet-migrate/migrate/migrations/20260423164911_v1_0_99.sql	Migration to add/drop step_name on core + OLAP task tables.
pkg/repository/task.go	Writes step_name when inserting tasks (plumbed into CreateTasks params).
pkg/repository/olap.go	Builds workflow-run output from per-task finished payloads keyed by step_name.
pkg/repository/sqlcv1/olap.sql	Inserts step_name into OLAP tasks and enriches workflow-run metadata JSON with step/output event info.
pkg/repository/sqlcv1/olap.sql.go	Regenerated sqlc code reflecting OLAP query/schema changes (incl. step_name).
pkg/repository/sqlcv1/tasks-overwrite.go	Extends CreateTasks SQL and params with step_name.
pkg/repository/sqlcv1/tasks.sql.go	Regenerated sqlc code reflecting core task schema/query changes (incl. step_name).
pkg/repository/sqlcv1/workers.sql.go	Regenerated sqlc code reflecting added step_name selection.
pkg/repository/sqlcv1/durable_event_log.sql.go	Regenerated sqlc code reflecting added step_name selection.
pkg/repository/sqlcv1/models.go	Adds StepName to sqlc models for v1_task and v1_tasks_olap.
pkg/repository/sqlcv1/copyfrom.go	Includes step_name in OLAP CopyFrom insert for tasks.
pkg/repository/sqlcv1/batch.go	Updates batch query to include step_name.