config: switch datasource to PostgreSQL, add OpenSearch and Flyway config

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

cameleer3-server-app/src/main/resources/application.yml

@@ -3,10 +3,13 @@ server:
 
 spring:
   datasource:
-    url: jdbc:ch://localhost:8123/cameleer3
+    url: jdbc:postgresql://localhost:5432/cameleer3
     username: cameleer
-    password: cameleer_dev
-    driver-class-name: com.clickhouse.jdbc.ClickHouseDriver
+    password: ${CAMELEER_DB_PASSWORD:cameleer_dev}
+    driver-class-name: org.postgresql.Driver
+  flyway:
+    enabled: true
+    locations: classpath:db/migration
   mvc:
     async:
       request-timeout: -1
@@ -29,8 +32,14 @@ ingestion:
   batch-size: 5000
   flush-interval-ms: 1000
 
-clickhouse:
-  ttl-days: 30
+opensearch:
+  url: ${OPENSEARCH_URL:http://localhost:9200}
+  queue-size: ${CAMELEER_OPENSEARCH_QUEUE_SIZE:10000}
+  debounce-ms: ${CAMELEER_OPENSEARCH_DEBOUNCE_MS:2000}
+
+cameleer:
+  body-size-limit: ${CAMELEER_BODY_SIZE_LIMIT:16384}
+  retention-days: ${CAMELEER_RETENTION_DAYS:30}
 
 security:
   access-token-expiry-ms: 3600000

cameleer3-server-app/src/test/resources/application-test.yml

@@ -1,18 +1,5 @@
 spring:
-  datasource:
-    url: jdbc:ch://placeholder:8123/cameleer3
-    username: default
-    password: ""
-    driver-class-name: com.clickhouse.jdbc.ClickHouseDriver
-
-ingestion:
-  buffer-capacity: 100
-  batch-size: 10
-  flush-interval-ms: 100
-
-agent-registry:
-  ping-interval-ms: 1000
-
-security:
-  bootstrap-token: test-bootstrap-token
-  bootstrap-token-previous: old-bootstrap-token
+  flyway:
+    enabled: true
+opensearch:
+  url: http://localhost:9200