fix(k8s): add datasource/kafka/redis config to k8s profile

K8s profile relied on shared/dev defaults for spring.datasource.url, but those
live inside the dev profile block — invisible when k8s profile is active.
Result: 'APPLICATION FAILED TO START — Failed to configure a DataSource'.

Move full datasource (and kafka/redis for projection-writer) wiring into the
k8s profile section. ENV vars come from Vault Agent injector
(ORDINIS_PG_USER/PASSWORD, ORDINIS_KAFKA_USER/PASSWORD, ORDINIS_REDIS_PASSWORD)
and chart-supplied ENV (ORDINIS_PG_HOST, ORDINIS_KAFKA_BOOTSTRAP, etc).

ordinis-read-api/src/main/resources/application.yml

@@ -111,6 +111,10 @@ spring:
         backend: secret
         application-name: ordinis/cuod
   datasource:
+    url: jdbc:postgresql://${ORDINIS_PG_HOST}:${ORDINIS_PG_PORT:5432}/${ORDINIS_PG_DB:ordinis}
+    username: ${ORDINIS_PG_USER}
+    password: ${ORDINIS_PG_PASSWORD}
+    driver-class-name: org.postgresql.Driver
     hikari:
       read-only: true
   jpa: