fix: auto-bump patch version in release workflow (#4)

Previously, when the Release workflow was triggered by workflow_run (after CI
completes on main), it would skip the release if the current version tag already
existed. This required manual version bumps before each release.

Now, when triggered by workflow_run:
- If current version tag doesn't exist → release with current version
- If current version tag exists → auto-bump patch version, update Cargo.toml, then release

This makes releases fully automatic after merging PRs to main.

Author: rishitank

.github/workflows/release.yml

@@ -108,8 +108,14 @@ jobs:
 
             # Check if this version tag already exists
             if git tag -l "v$CURRENT_VERSION" | grep -q .; then
-              echo "Tag v$CURRENT_VERSION already exists, skipping release"
-              echo "should_release=false" >> $GITHUB_OUTPUT
+              echo "Tag v$CURRENT_VERSION already exists, auto-bumping patch version"
+              # Auto-bump patch version
+              IFS='.' read -r MAJOR MINOR PATCH <<< "$CURRENT_VERSION"
+              NEW_VERSION="${MAJOR}.${MINOR}.$((PATCH + 1))"
+              echo "Auto-bumped to: $NEW_VERSION"
+              echo "should_release=true" >> $GITHUB_OUTPUT
+              echo "version=$NEW_VERSION" >> $GITHUB_OUTPUT
+              echo "needs_bump=true" >> $GITHUB_OUTPUT
             else
               echo "New version v$CURRENT_VERSION detected, will release"
               echo "should_release=true" >> $GITHUB_OUTPUT