feat(actions): implement jobs.<job_id>.continue-on-error (#38100)

Support `continue-on-error` for workflow jobs when aggregating an
Actions workflow run status.

Previously, `continue-on-error` was parsed from workflow YAML but was
not persisted or used when calculating the overall run result. As a
result, a failed job could incorrectly fail the entire workflow even
when the workflow explicitly allowed that job to fail.

This PR stores the parsed `continue-on-error` value on each action run
job and treats failed jobs with `continue-on-error: true` as successful
when computing the workflow run status, matching GitHub Actions
behavior.

## Changes

- Add `ContinueOnError` to `jobparser.Job`.
- Add `continue_on_error` to `ActionRunJob` with a `NOT NULL DEFAULT
FALSE` migration.
- Populate `ActionRunJob.ContinueOnError` when creating workflow run
jobs.
- Update workflow status aggregation so failed `continue-on-error` jobs
do not fail the overall run.
- Leave `resolveCheckNeeds` unchanged so dependent jobs still see the
job result as `failure` and are skipped by default.

## Compatibility

This is backward compatible.

If only the runner or only the server is updated, `continue-on-error`
continues to degrade to the previous behavior and is effectively ignored
until both sides support it.

Related runner PR: https://gitea.com/gitea/runner/pulls/1032

---------

Signed-off-by: bircni <bircni@icloud.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

models/migrations/migrations.go

@@ -417,6 +417,7 @@ func prepareMigrationTasks() []*migration {
 		newMigration(337, "Add visibility to team", v1_27.AddVisibilityToTeam),
 		newMigration(338, "Expand legacy MSSQL issue/comment long-text columns", v1_27.ExpandIssueAndCommentLongTextFieldsForMSSQL),
 		newMigration(339, "Extend action c_u index to include created_unix for faster dashboard feed queries", v1_27.AddCreatedUnixToActionUserIsDeletedIndex),
+		newMigration(340, "Add ContinueOnError column to ActionRunJob", v1_27.AddContinueOnErrorToActionRunJob),
 	}
 	return preparedMigrations
 }

models/migrations/v1_27/v340.go

@@ -0,0 +1,24 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package v1_27
+
+import (
+	"gitea.dev/models/db"
+
+	"xorm.io/xorm"
+)
+
+// AddContinueOnErrorToActionRunJob adds the ContinueOnError column to ActionRunJob,
+// storing the job-level continue-on-error value from the workflow YAML.
+func AddContinueOnErrorToActionRunJob(x db.EngineMigration) error {
+	type ActionRunJob struct {
+		ContinueOnError bool `xorm:"NOT NULL DEFAULT FALSE"`
+	}
+
+	_, err := x.SyncWithOptions(xorm.SyncOptions{
+		IgnoreDropIndices: true,
+		IgnoreConstrains:  true,
+	}, new(ActionRunJob))
+	return err
+}