fix(rest-postgres): increase postgres PVC storage to 10Gi

The postgres StatefulSet requested a 1Gi PVC. Despite the nico_rest
database moving to nico-pg-cluster in #3081, this StatefulSet is still
applied on every reference install by helm-prereqs/setup.sh (Phase 7c),
and postgres-0 remains the single backing store for Temporal (temporal,
temporal_visibility) and Keycloak, plus nico-rest-api and the workflow
workers in the standalone kustomize path and in local kind dev.

Temporal history and visibility are the fastest-growing tables in the
stack, and Keycloak shares the volume, so a full disk takes out
authentication along with workflow execution. Bump the
volumeClaimTemplates request to 10Gi, matching the
postgresql.volumeSize default already used for nico-pg-cluster in
helm-prereqs.

Update the manifest table in INSTALLATION.md to match.

Signed-off-by: Shreyansh Agarwal <shreyansh.agarwal@e2enetworks.com>

Author: Shreyansh-Agarwal2022

rest-api/deploy/INSTALLATION.md

@@ -169,7 +169,7 @@ A single-replica PostgreSQL 14 StatefulSet that hosts all databases for the NICo
 | `base/postgres/namespace.yaml` | `postgres` namespace |
 | `base/postgres/admin-creds.yaml` | Secret `admin-creds` — postgres superuser password |
 | `base/postgres/init-configmap.yaml` | ConfigMap `postgres-init` — SQL init script |
-| `base/postgres/statefulset.yaml` | StatefulSet `postgres` — `postgres:14.4-alpine`, 1Gi PVC |
+| `base/postgres/statefulset.yaml` | StatefulSet `postgres` — `postgres:14.4-alpine`, 10Gi PVC |
 | `base/postgres/service.yaml` | ClusterIP Service on port 5432 — DNS: `postgres.postgres` |
 | `base/postgres/adminer.yaml` | Optional Adminer web UI |
 

rest-api/deploy/kustomize/base/postgres/statefulset.yaml

@@ -76,4 +76,4 @@ spec:
         accessModes: ["ReadWriteOnce"]
         resources:
           requests:
-            storage: 1Gi
+            storage: 10Gi