fix(ci): inline notify-chart-dev gate into bump step

The two-step pattern was failing under Forgejo runner v12.9.0 — the
gate step exited 141 immediately after echoing + writing GITHUB_OUTPUT,
even with no pipelines involved. Folding the stable-tag check into the
bump step's own strict-mode shell removes the cross-step boundary that
the runner was tripping over.

.forgejo/workflows/notify-chart-dev.yml

@@ -39,28 +39,23 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Detect cut type (skip if HEAD has stable tag)
-        id: gate
+      - name: Auto-bump chart develop appVersion + push
         run: |
           set -eu
-          # Avoid `git tag | grep -q ^zddc-server-v` — under bash's
-          # default `pipefail`, grep -q closing stdin early gives git
-          # SIGPIPE (exit 141), which the runner's strict-mode wrapper
-          # treats as a step failure even though the if-condition logic
-          # is correct. Materialize the tag list first, then test it.
+
+          # Self-skip if HEAD has a stable tag — the prod workflow
+          # owns the chart bump in that case. Inlined here (rather
+          # than as a separate gate step) because Forgejo runner
+          # v12.9.0 was exiting our gate step with 141 immediately
+          # after a clean echo + GITHUB_OUTPUT write. Folding the
+          # check into the bump step's strict-mode shell avoids the
+          # cross-step boundary entirely.
           STABLE_TAGS=$(git tag --points-at HEAD --list 'zddc-server-v*')
           if [ -n "$STABLE_TAGS" ]; then
-              echo "is_beta=false" >> "$GITHUB_OUTPUT"
-              echo "HEAD has zddc-server-v* tag ($STABLE_TAGS) — stable workflow handles this; skipping dev notify"
-          else
-              echo "is_beta=true" >> "$GITHUB_OUTPUT"
-              echo "No stable tag at HEAD; treating as beta cut"
+              echo "HEAD has stable tag ($STABLE_TAGS) — stable workflow handles chart bump; skipping dev notify"
+              exit 0
           fi
-
-      - name: Auto-bump chart develop appVersion + push
-        if: steps.gate.outputs.is_beta == 'true'
-        run: |
-          set -eu
+          echo "No stable tag at HEAD; treating as beta cut"
 
           if [ -z "${CHART_FORGEJO_TOKEN:-}" ]; then
               echo "::error::CHART_FORGEJO_TOKEN secret not set on this repo" >&2