fix(release): poll branch readiness before .version write (#22)

## Why

Release workflow intermittently failed at the `.version` write step with `exit 22` and no diagnostic output. The CHANGELOG.md PUT creates the `next-release` branch via the `new_branch` parameter, then the `.version` PUT fires ~2s later — racing Gitea's branch indexing. Because the call used `curl -sf` (fail-silent), 404/409 responses produced exit 22 with no body, leaving logs unhelpful.

## Changes

- Move the existing branch-readiness poll to run **right after** the CHANGELOG.md commit, before `.version` is written.
- Replace the silent `.version` write with a 5-attempt retry loop that logs HTTP code and body on failure (same pattern already used for PR creation).

## Test plan

- [ ] Trigger Release.yml on a repo with a pending changelog entry; confirm `.version` write succeeds first try and PR is created.
- [ ] If a transient failure happens, log now shows HTTP code + body.

Reviewed-on: #22

.gitea/workflows/Release.yml

@@ -158,37 +158,7 @@ jobs:
             exit 1
           fi
 
-          # Check if .version exists on base branch
-          VERSION_SHA=$(curl -sf --retry 3 --retry-delay 2 --retry-connrefused \
-            -H "Authorization: token ${TOKEN}" \
-            "${API_URL}/contents/.version?ref=${BASE_BRANCH}" | jq -r '.sha // empty')
-
-          if [ -n "${VERSION_SHA}" ]; then
-            echo "Updating .version on next-release branch..."
-            curl -sf --retry 3 --retry-delay 2 --retry-connrefused -X PUT \
-              -H "Authorization: token ${TOKEN}" \
-              -H "Content-Type: application/json" \
-              --data "$(jq -n \
-                --arg content "${VERSION_CONTENT}" \
-                --arg sha "${VERSION_SHA}" \
-                --arg message "${TITLE}" \
-                --arg branch "next-release" \
-                '{content: $content, sha: $sha, message: $message, branch: $branch}')" \
-              "${API_URL}/contents/.version"
-          else
-            echo "Creating .version on next-release branch..."
-            curl -sf --retry 3 --retry-delay 2 --retry-connrefused -X POST \
-              -H "Authorization: token ${TOKEN}" \
-              -H "Content-Type: application/json" \
-              --data "$(jq -n \
-                --arg content "${VERSION_CONTENT}" \
-                --arg message "${TITLE}" \
-                --arg branch "next-release" \
-                '{content: $content, message: $message, branch: $branch}')" \
-              "${API_URL}/contents/.version"
-          fi
-
-          echo "Creating new PR..."
+          # Wait for next-release branch to be indexed by Gitea before subsequent writes
           echo "Waiting for next-release branch to be ready..."
           for i in $(seq 1 10); do
             BRANCH_STATUS=$(curl -s --retry 3 --retry-delay 2 --retry-connrefused \
@@ -207,6 +177,53 @@ jobs:
             sleep 3
           done
 
+          # Check if .version exists on base branch
+          VERSION_SHA=$(curl -sf --retry 3 --retry-delay 2 --retry-connrefused \
+            -H "Authorization: token ${TOKEN}" \
+            "${API_URL}/contents/.version?ref=${BASE_BRANCH}" | jq -r '.sha // empty')
+
+          if [ -n "${VERSION_SHA}" ]; then
+            echo "Updating .version on next-release branch..."
+            VERSION_PAYLOAD=$(jq -n \
+              --arg content "${VERSION_CONTENT}" \
+              --arg sha "${VERSION_SHA}" \
+              --arg message "${TITLE}" \
+              --arg branch "next-release" \
+              '{content: $content, sha: $sha, message: $message, branch: $branch}')
+            VERSION_METHOD=PUT
+          else
+            echo "Creating .version on next-release branch..."
+            VERSION_PAYLOAD=$(jq -n \
+              --arg content "${VERSION_CONTENT}" \
+              --arg message "${TITLE}" \
+              --arg branch "next-release" \
+              '{content: $content, message: $message, branch: $branch}')
+            VERSION_METHOD=POST
+          fi
+
+          for i in $(seq 1 5); do
+            RESPONSE=$(curl -s --retry 3 --retry-delay 2 --retry-connrefused \
+              -w "\n%{http_code}" -X "${VERSION_METHOD}" \
+              -H "Authorization: token ${TOKEN}" \
+              -H "Content-Type: application/json" \
+              --data "${VERSION_PAYLOAD}" \
+              "${API_URL}/contents/.version")
+            HTTP_CODE=$(echo "${RESPONSE}" | tail -1)
+            BODY=$(echo "${RESPONSE}" | sed '$d')
+            if [ "${HTTP_CODE}" -lt 400 ]; then
+              echo ".version write succeeded"
+              break
+            fi
+            if [ "${i}" = "5" ]; then
+              echo "Error writing .version after 5 attempts (HTTP ${HTTP_CODE}): ${BODY}"
+              exit 1
+            fi
+            echo ".version write attempt ${i}/5 failed (HTTP ${HTTP_CODE}): ${BODY} — retrying..."
+            sleep 3
+          done
+
+          echo "Creating new PR..."
+
           PR_DATA=$(jq -n \
             --arg title "${TITLE}" \
             --arg body "${DESCRIPTION}" \