fix(app): incorrectly duplicated env vars for new batch trigger system (#2789)

apps/webapp/app/env.server.ts

@@ -544,7 +544,7 @@ const EnvironmentSchema = z
     BATCH_RATE_LIMIT_REFILL_RATE: z.coerce.number().int().default(100),
     BATCH_RATE_LIMIT_MAX: z.coerce.number().int().default(1200),
     BATCH_RATE_LIMIT_REFILL_INTERVAL: z.string().default("10s"),
-    BATCH_CONCURRENCY_LIMIT_DEFAULT: z.coerce.number().int().default(10),
+    BATCH_CONCURRENCY_LIMIT_DEFAULT: z.coerce.number().int().default(1),
 
     REALTIME_STREAM_VERSION: z.enum(["v1", "v2"]).default("v1"),
     REALTIME_STREAM_MAX_LENGTH: z.coerce.number().int().default(1000),
@@ -948,8 +948,6 @@ const EnvironmentSchema = z
     // Global rate limit: max items processed per second across all consumers
     // If not set, no global rate limiting is applied
     BATCH_QUEUE_GLOBAL_RATE_LIMIT: z.coerce.number().int().positive().optional(),
-    // Processing concurrency: max concurrent batch items being processed per environment
-    BATCH_CONCURRENCY_DEFAULT_CONCURRENCY: z.coerce.number().int().default(1),
 
     ADMIN_WORKER_ENABLED: z.string().default(process.env.WORKER_ENABLED ?? "true"),
     ADMIN_WORKER_CONCURRENCY_WORKERS: z.coerce.number().int().default(2),

apps/webapp/app/v3/runEngine.server.ts

@@ -176,7 +176,7 @@ function createRunEngine() {
       consumerIntervalMs: env.BATCH_QUEUE_CONSUMER_INTERVAL_MS,
       // Default processing concurrency when no specific limit is set
       // This is overridden per-batch based on the plan type at batch creation
-      defaultConcurrency: env.BATCH_CONCURRENCY_DEFAULT_CONCURRENCY,
+      defaultConcurrency: env.BATCH_CONCURRENCY_LIMIT_DEFAULT,
       // Optional global rate limiter - limits max items/sec processed across all consumers
       globalRateLimiter: env.BATCH_QUEUE_GLOBAL_RATE_LIMIT
         ? createBatchGlobalRateLimiter(env.BATCH_QUEUE_GLOBAL_RATE_LIMIT)