Merge branch 'main' into style/musd-calc

Author: andrewjcohen

.github/guidelines/E2E_DECISION_TREE.md

@@ -33,7 +33,7 @@ To save infra resources while waiting for static analysis findings and potential
 - E2E tests are skipped and merge is blocked while the label is present, **unless** all changes are ignorable-only.
 - If E2E tests are needed, they should pass to be able to merge.
 
-## AI test selection
+## Smart AI E2E test selection
 
 Runs only when all of the following are true:
 
@@ -53,3 +53,10 @@ Flakiness detection is applied to modified E2E test files in PRs:
 - Modified E2E test files run twice
 - It applies to existing test files as well as new test files added in the PR
 - It can be disabled by adding the label `skip-e2e-flakiness-detection`. Useful when making large refactors or when changes don't pose flakiness risk.
+
+## Release branches
+
+PRs to release branches (cherry-picked from main) are exempt from the following:
+
+- Label `pr-not-ready-for-e2e` is not applied
+- Smart AI E2E selection is skipped - all E2E suites are run (if changes are not ignorable-only, e.g. only docs)