[ECOINT-154] Add Dagster+ integration (DataDog#2655)

* Add Dagster+ integration

* Update Dagster+ integration

* Update Dagster+ integration

* Fix pipeline test

* Update dagster.yaml

* Update dagster.yaml

* Update Dagster+ integration

* Update dagster.yaml

* Update dagster_tests.yaml

* update appid

* fix filenames

* add codeowners entry

* Update Dagster+ integration

* revert folder name and logs changes

* update app id

* remove comments

* fix log pipeline

* fix app id, reformat log test

* format logs, fix codeowners, fix log source

* rereformat logs file

* update source type name

* Update Dagster+ integration

* update log pipeline

* update log pipeline

* update log tests

* update codeowners

---------

Co-authored-by: dd-pub-platform[bot] <157534740+dd-pub-platform[bot]@users.noreply.github.com>
Co-authored-by: Erica Ho <[email protected]>
Co-authored-by: James Eichelbaum <[email protected]>
Co-authored-by: James Eichelbaum <[email protected]>

Author: 3 people

.github/CODEOWNERS

@@ -1167,6 +1167,8 @@
 /authzed_cloud/                 @DataDog/ecosystems-review
 /akamas/                        @DataDog/ecosystems-review
 
+/dagster/              @DataDog/ecosystems-review
+
 # LEAVE THE FOLLOWING LOG OWNERSHIP LAST IN THE FILE
 # Make sure logs team is the full owner for all logs related files
 **/assets/logs/                          @DataDog/logs-integrations-reviewers @DataDog/logs-backend

dagster/CHANGELOG.md

@@ -0,0 +1,7 @@
+# CHANGELOG - Dagster+
+
+## 1.0.0 / 2025-05-29
+
+_**Added**_:
+
+* Initial Release

dagster/README.md

@@ -0,0 +1,34 @@
+# Dagster+
+
+## Overview
+
+Dagster is a next-generation open-source orchestration platform designed for building, running, and monitoring data asset workflows. The Dagster+ integration streams [event logs][1] to Datadog and includes an out-of-the-box log pipeline and dashboard.
+
+## Setup
+
+1. In Datadog, navigate to the Dagster integration tile and click **Connect Accounts** to launch the OAuth flow.
+
+2. Log in to Dagster+ using the account you want to use for this integration.
+
+3. When redirected to Datadog, click **Authorize** to grant Dagster+ permission to create an API key for sending logs to your Datadog account.
+
+### Validation
+
+Within 10 minutes of completing the integration setup, the Dagster Overview dashboard starts showing new log events, provided there are any active Dagster jobs emitting events.
+
+## Uninstallation
+
+1. Navigate to the Dagster+ integration tile and click **Uninstall Integration**.
+
+2. After uninstalling the integration, all previous authorizations are revoked.
+
+3. Disable all API keys associated with this integration by searching for the integration name on the [API Keys page][2].
+
+## Support
+
+Need help? Contact [Dagster support][3].
+
+
+[1]: https://docs.dagster.io/guides/monitor/logging
+[2]: https://github.com/DataDog/integrations-extras/blob/master/organization-settings/api-keys?filter=Dagster
+[3]: https://dagster.io/support