Fixed - [scripts] [custom-release] [release-target] Stopped release-target sync from requiring the remote release branch when an explicit target tag/ref is configured.

- 1 - I updated [`.maintain-custom-release.sh`](/config/workspace/gitea-dev/gitea/.maintain-custom-release.sh) so `Sync upstream release target commits` validates only the configured `UPSTREAM_RELEASE_TARGET_REF` when one is set, instead of still failing on a missing local `upstream/release/...` remote-tracking branch after successfully fetching a target tag such as `v1.26.1`.

(cherry picked from commit 244a472691)

.codex-history.md

@@ -780,3 +780,6 @@ History search guidance:
 - 1 - I renamed the bootstrap admin actor label and the related immutable-account locale key from `good` to `god` in the admin grant helpers and admin users UI flow.
 - 2 - I updated the admin API and admin-panel restriction messages, tests, and both English and Romanian locale strings so bootstrap-protected accounts are consistently labeled as `GOD`-granted.
 - 3 - I updated the matching historical task descriptions in `.codex-history.md` so the earlier admin-policy entries now use the corrected `GOD` terminology.
+
+155 - [2026-05-17 15:35:49] - v1.26.0-by-petru - Type: Fixed - [scripts] [custom-release] [release-target] Stopped release-target sync from requiring the remote release branch when an explicit target tag/ref is configured.
+- 1 - I updated [`.maintain-custom-release.sh`](/config/workspace/gitea-dev/gitea/.maintain-custom-release.sh) so `Sync upstream release target commits` validates only the configured `UPSTREAM_RELEASE_TARGET_REF` when one is set, instead of still failing on a missing local `upstream/release/...` remote-tracking branch after successfully fetching a target tag such as `v1.26.1`.

.maintain-custom-release.sh

@@ -778,6 +778,12 @@ ensure_upstream_compare_ref_exists() {
 ensure_upstream_target_ref_exists() {
   local source_ref=""
 
+  if [ -n "$UPSTREAM_RELEASE_TARGET_REF" ]; then
+    source_ref="$(resolve_upstream_release_import_ref)"
+    git rev-parse --verify "$source_ref" >/dev/null 2>&1 || die "Upstream release target ref '$source_ref' was not found locally."
+    return
+  fi
+
   normalize_upstream_release_branch
   source_ref="$(resolve_upstream_release_import_ref)"
   git rev-parse --verify "$source_ref" >/dev/null 2>&1 || die "Upstream release target ref '$source_ref' was not found locally."