update cursor cloud agent rules

Author: brendan-kellam

.cursor/rules/cloud_agent.mdc

@@ -1,6 +1,5 @@
 ---
-description: This rule should only be used when running in the context of a cloud agent.
-alwaysApply: false
+alwaysApply: true
 ---
-
-- After creating a PR, create a follow-up commit with a Changelog entry in CHANGELOG.md with a short description of the change. Follow the existing conventions in that file, namely: 1) entries must be parented under a header (Added, Changed, Deprecated, Removed, Fixed, or Security), 2) entries must include the GitHub pull request id at the end of the line, formatted as [#<id>](<url>) (e.g., [#696](https://github.com/sourcebot-dev/sourcebot/pull/696)).
+- After creating a GitHub PR, create a follow-up commit with a Changelog entry in CHANGELOG.md with a short description of the change. Follow the existing conventions in that file, namely: 1) entries must be parented under a header (Added, Changed, Deprecated, Removed, Fixed, or Security), 2) entries must include the GitHub pull request id at the end of the line, formatted as [#<id>](<url>) (e.g., [#696](https://github.com/sourcebot-dev/sourcebot/pull/696)).
+- When creating a GitHub PR for a given issue, always include "Fixes #<id>" in the body of the GitHub PR description, where <id> is the id of the GitHub issue.