Initial semaphore 2.19.8 package with service, container and postgresql subpackages

Semaphore UI packaged from the upstream community (MIT) release
binaries, following the gitea packaging pattern: native systemd service
and Podman quadlet variants (mutually exclusive), with an optional
PostgreSQL backend via quadlet drop-ins. SQLite is the default
database; session/encryption secrets are generated into
/etc/semaphore/env on first install.

semaphore.container

@@ -0,0 +1,25 @@
+[Unit]
+Description=Semaphore UI - modern UI for Ansible, Terraform and OpenTofu
+
+[Container]
+Image=docker.io/semaphoreui/semaphore:v2.19.8
+ContainerName=semaphore
+Pod=semaphore.pod
+Volume=/var/lib/semaphore:/var/lib/semaphore:z
+Volume=/etc/semaphore:/etc/semaphore:z
+Volume=/etc/localtime:/etc/localtime:ro
+EnvironmentFile=/etc/semaphore/env
+Environment=SEMAPHORE_CONFIG_PATH=/etc/semaphore
+Notify=healthy
+HealthCmd=curl --fail --silent --output /dev/null http://localhost:3000/api/ping
+HealthInterval=30s
+HealthTimeout=10s
+HealthRetries=5
+HealthStartPeriod=120s
+HealthOnFailure=kill
+LogDriver=journald
+
+[Service]
+Restart=always
+RestartSec=5
+TimeoutStartSec=900