chore: update changelog generation to sync database

### CHANGES

- Add database sync command to changelog workflow
- Remove unnecessary newline addition in changelog processing

.github/workflows/update-version-and-create-tag.yml

@@ -89,6 +89,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           go run ./cmd/generate_changelog --process-prs ${{ env.new_tag }}
+          go run ./cmd/generate_changelog --sync-db
       - name: Commit changes
         run: |
           # These files are modified by the version bump process

cmd/generate_changelog/internal/changelog/processing.go

@@ -140,7 +140,7 @@ func (g *Generator) CreateNewChangelogEntry(version string) error {
 			continue // Continue to attempt processing other files
 		}
 		content.WriteString(string(data))
-		content.WriteString("\n")
+		// Note: No extra newline needed here as each incoming file already ends with a newline
 	}
 
 	if len(processingErrors) > 0 {