Merge branch 'develop'

Add auto-tag workflow: create release tag from pom.xml on merge to main

Merge branch 'develop'

Merge pull request #164 from rygel/chore/release-0.7.3

Bump version to 0.7.3 — bug fixes, auto-admin, demo improvements

Merge pull request #163 from rygel/docs/caddy-infrastructure-examples

Merge pull request #162 from rygel/feat/first-user-admin

fix: enable registration in E2E tests

docs: add Docker networking pitfall, CSRF guide, and PostgreSQL example

Merge pull request #161 from rygel/fix/sw-and-flaky-test

feat: first registered user gets admin, registration auto-closes

Fix service worker missing file and flaky Windows search test

Merge pull request #160 from rygel/docs/csrf-and-caddy

Fix tests: update logout button assertions for form-based logout

Fix logout button: use regular form POST instead of HTMX