Pin ClickHouse image version and increase healthcheck start periods

- Pin ClickHouse to 25.3 to avoid pulling unpredictable latest versions
- Increase start_period from 1s to 30s for ClickHouse and MinIO
  healthchecks so containers have time to initialize before checks count

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: mpk-droid

agents/langflow/simple_tool_calling_agent/local/podman-compose.yml

@@ -112,7 +112,7 @@ services:
 
   # ── ClickHouse (Langfuse analytics DB) ──────────────────────────────
   clickhouse:
-    image: docker.io/clickhouse/clickhouse-server
+    image: docker.io/clickhouse/clickhouse-server:25.3
     restart: always
     user: "101:101"
     environment:
@@ -127,7 +127,7 @@ services:
       interval: 5s
       timeout: 5s
       retries: 10
-      start_period: 1s
+      start_period: 30s
 
   # ── MinIO (Langfuse S3-compatible object storage) ───────────────────
   minio:
@@ -145,7 +145,7 @@ services:
       interval: 5s
       timeout: 5s
       retries: 5
-      start_period: 1s
+      start_period: 30s
 
   # ── Redis (Langfuse caching + job queue) ────────────────────────────
   redis: