docs: replace kindred.internal with example.internal in all docs and config

Replace all references to internal hostnames (silo.kindred.internal,
psql.kindred.internal, minio.kindred.internal, ipa.kindred.internal,
keycloak.kindred.internal) with example.internal equivalents.

Replace gitea.kindred.internal and git.kindred.internal with the public
git.kindred-systems.com instance. Also fix stale silo-0062 repo name
in setup-host.sh and DEPLOYMENT.md.

config.example.yaml

@@ -8,7 +8,7 @@ server:
   # read_only: false  # Reject all write operations; toggle at runtime with SIGUSR1
 
 database:
-  host: "psql.kindred.internal"
+  host: "psql.example.internal"
   port: 5432
   name: "silo"
   user: "silo"
@@ -17,7 +17,7 @@ database:
   max_connections: 10
 
 storage:
-  endpoint: "minio.kindred.internal:9000"
+  endpoint: "minio.example.internal:9000"
   access_key: "" # Use SILO_MINIO_ACCESS_KEY env var
   secret_key: "" # Use SILO_MINIO_SECRET_KEY env var
   bucket: "silo-files"
@@ -53,7 +53,7 @@ auth:
   # LDAP / FreeIPA
   ldap:
     enabled: false
-    url: "ldaps://ipa.kindred.internal"
+    url: "ldaps://ipa.example.internal"
     base_dn: "dc=kindred,dc=internal"
     user_search_dn: "cn=users,cn=accounts,dc=kindred,dc=internal"
     # Optional service account for user search (omit for direct user bind)
@@ -77,10 +77,10 @@ auth:
   # OIDC / Keycloak
   oidc:
     enabled: false
-    issuer_url: "https://keycloak.kindred.internal/realms/silo"
+    issuer_url: "https://keycloak.example.internal/realms/silo"
     client_id: "silo"
     client_secret: "" # Use SILO_OIDC_CLIENT_SECRET env var
-    redirect_url: "https://silo.kindred.internal/auth/callback"
+    redirect_url: "https://silo.example.internal/auth/callback"
     scopes: ["openid", "profile", "email"]
     # Map Keycloak realm roles to Silo roles
     admin_role: "silo-admin"
@@ -90,4 +90,4 @@ auth:
   # CORS origins (locked down when auth is enabled)
   cors:
     allowed_origins:
-      - "https://silo.kindred.internal"
+      - "https://silo.example.internal"