Add release management targets to Makefile [skip ci]

Added semantic versioning targets similar to rootly-go:
- make version: Show current version and recent tags
- make bump-patch: Bump patch version (0.0.1 -> 0.0.2)
- make bump-minor: Bump minor version (0.0.1 -> 0.1.0)
- make bump-major: Bump major version (0.0.1 -> 1.0.0)
- make push-tag: Push latest tag to remote
- make release-patch: Bump patch and push tag
- make release-minor: Bump minor and push tag
- make release-major: Bump major and push tag

Version bumping updates both pom.xml and build.gradle, creates
a git commit, and creates a git tag. Use release-* targets for
one-step version bump and tag push.

Author: kwent

Makefile

@@ -1,4 +1,4 @@
-.PHONY: build build-docker build-local upgrade-deps
+.PHONY: build build-docker build-local upgrade-deps version bump-patch bump-minor bump-major push-tag release-patch release-minor release-major
 
 # Default target uses Docker (recommended - no Java installation required)
 build: build-docker
@@ -38,3 +38,76 @@ upgrade-deps:
 		mvn versions:use-latest-versions -DallowMajorUpdates=false -DprocessDependencyManagement=false
 	@echo "✓ Dependencies upgraded in pom.xml"
 	@echo "⚠️  Remember to manually sync versions to build.gradle"
+
+# Version management
+LATEST_TAG := $(shell git tag -l 'v*' --sort=-v:refname | head -1)
+LATEST_TAG_OR_DEFAULT := $(if $(LATEST_TAG),$(LATEST_TAG),v0.0.0)
+CURRENT_VERSION := $(shell grep '<version>' pom.xml | head -1 | sed 's/.*<version>\(.*\)<\/version>.*/\1/')
+
+version: ## Show current version and recent tags
+	@echo "Current version (pom.xml): $(CURRENT_VERSION)"
+	@echo "Latest git tag: $(LATEST_TAG_OR_DEFAULT)"
+	@echo ""
+	@echo "Recent tags:"
+	@git tag -l 'v*' --sort=-v:refname | head -5
+
+bump-patch: ## Bump patch version (0.0.1 -> 0.0.2)
+	@if [ -z "$(LATEST_TAG)" ]; then \
+		NEW_VERSION="0.0.1"; \
+		NEW_TAG="v0.0.1"; \
+	else \
+		NEW_VERSION=$$(echo $(LATEST_TAG) | sed 's/v//' | awk -F. '{print $$1"."$$2"."$$3+1}'); \
+		NEW_TAG="v$$NEW_VERSION"; \
+	fi; \
+	echo "Bumping $(LATEST_TAG_OR_DEFAULT) -> $$NEW_TAG"; \
+	sed -i '' "s|<version>$(CURRENT_VERSION)</version>|<version>$$NEW_VERSION</version>|" pom.xml; \
+	sed -i '' "s|version = '$(CURRENT_VERSION)'|version = '$$NEW_VERSION'|" build.gradle; \
+	git add pom.xml build.gradle; \
+	git commit -m "Bump version to $$NEW_VERSION [skip ci]"; \
+	git tag -a $$NEW_TAG -m "Release $$NEW_TAG"; \
+	echo "✓ Created tag $$NEW_TAG (use 'make push-tag' to push)"
+
+bump-minor: ## Bump minor version (0.0.1 -> 0.1.0)
+	@if [ -z "$(LATEST_TAG)" ]; then \
+		NEW_VERSION="0.1.0"; \
+		NEW_TAG="v0.1.0"; \
+	else \
+		NEW_VERSION=$$(echo $(LATEST_TAG) | sed 's/v//' | awk -F. '{print $$1"."$$2+1".0"}'); \
+		NEW_TAG="v$$NEW_VERSION"; \
+	fi; \
+	echo "Bumping $(LATEST_TAG_OR_DEFAULT) -> $$NEW_TAG"; \
+	sed -i '' "s|<version>$(CURRENT_VERSION)</version>|<version>$$NEW_VERSION</version>|" pom.xml; \
+	sed -i '' "s|version = '$(CURRENT_VERSION)'|version = '$$NEW_VERSION'|" build.gradle; \
+	git add pom.xml build.gradle; \
+	git commit -m "Bump version to $$NEW_VERSION [skip ci]"; \
+	git tag -a $$NEW_TAG -m "Release $$NEW_TAG"; \
+	echo "✓ Created tag $$NEW_TAG (use 'make push-tag' to push)"
+
+bump-major: ## Bump major version (0.0.1 -> 1.0.0)
+	@if [ -z "$(LATEST_TAG)" ]; then \
+		NEW_VERSION="1.0.0"; \
+		NEW_TAG="v1.0.0"; \
+	else \
+		NEW_VERSION=$$(echo $(LATEST_TAG) | sed 's/v//' | awk -F. '{print $$1+1".0.0"}'); \
+		NEW_TAG="v$$NEW_VERSION"; \
+	fi; \
+	echo "Bumping $(LATEST_TAG_OR_DEFAULT) -> $$NEW_TAG"; \
+	sed -i '' "s|<version>$(CURRENT_VERSION)</version>|<version>$$NEW_VERSION</version>|" pom.xml; \
+	sed -i '' "s|version = '$(CURRENT_VERSION)'|version = '$$NEW_VERSION'|" build.gradle; \
+	git add pom.xml build.gradle; \
+	git commit -m "Bump version to $$NEW_VERSION [skip ci]"; \
+	git tag -a $$NEW_TAG -m "Release $$NEW_TAG"; \
+	echo "✓ Created tag $$NEW_TAG (use 'make push-tag' to push)"
+
+push-tag: ## Push the latest tag to remote
+	@TAG=$$(git tag -l 'v*' --sort=-v:refname | head -1); \
+	if [ -z "$$TAG" ]; then \
+		echo "No tags found"; \
+		exit 1; \
+	fi; \
+	echo "Pushing $$TAG to origin..."; \
+	git push origin $$TAG
+
+release-patch: bump-patch push-tag ## Bump patch version and push tag
+release-minor: bump-minor push-tag ## Bump minor version and push tag
+release-major: bump-major push-tag ## Bump major version and push tag