Prevent socket hangup error by removing the aggressive clickhouse keep alive ttl env var default (#2082)

Author: ericallam

apps/webapp/app/env.server.ts

@@ -770,7 +770,7 @@ const EnvironmentSchema = z.object({
   RUN_REPLICATION_LEADER_LOCK_RETRY_INTERVAL_MS: z.coerce.number().int().default(500),
   RUN_REPLICATION_WAIT_FOR_ASYNC_INSERT: z.string().default("0"),
   RUN_REPLICATION_KEEP_ALIVE_ENABLED: z.string().default("1"),
-  RUN_REPLICATION_KEEP_ALIVE_IDLE_SOCKET_TTL_MS: z.coerce.number().int().default(9_000),
+  RUN_REPLICATION_KEEP_ALIVE_IDLE_SOCKET_TTL_MS: z.coerce.number().int().optional(),
   RUN_REPLICATION_MAX_OPEN_CONNECTIONS: z.coerce.number().int().default(10),
 });