Bump version to 1.0.2

- Add scripts/bump-version.sh for semver patch increments
- Update AGENTS.md Dev Commands section and add Version Bumping docs
- Makefile default VERSION bumped to 1.0.2

cmd/server/main.go

@@ -20,7 +20,7 @@ import (
 	"github.com/syncserver/internal/syncengine"
 )
 
-var version = "1.0.1"
+var version = "1.0.2"
 
 func main() {
 	cfgPath := flag.String("config", "", "Path to config.yaml")