rallly: seccompProfile RuntimeDefault in the pod context

Sets seccompProfile.type: RuntimeDefault in the pod security context, so
the container runtime's default syscall filter applies to every container
in the pod.

The value lives in the pod context rather than the container context
because it covers init containers and any container added later without
being repeated; a container that needs a different filter can still
override it under securityContext.container, which wins over the pod
value.

Verified in k3d against the database path rather than a static page:
under the filter the app opens its connection to Postgres and Prisma
applies all migrations (141 rows in _prisma_migrations, 31 tables
created), and the server-rendered pages answer with HTTP 200. The kernel
reports Seccomp: 2 (filter mode) inside the container.

Major bump: runtime behavior changes.

Refs #84

rallly/Chart.yaml

@@ -5,7 +5,7 @@ icon: https://raw.githubusercontent.com/lukevella/rallly/main/apps/landing/publi
 
 type: application
 
-version: 7.0.0+up4.12.3
+version: 8.0.0+up4.12.3
 appVersion: "4.12.3"
 
 maintainers: