perf(webapp): lower the default progressive trace view cap to 150k spans

Progressive trace loading now shows up to 150k spans by default (configurable with EVENTS_CLICKHOUSE_MAX_TRACE_VIEW_COUNT).

Mono-RevId: a3b877a9ea47243ca687e8be8056f448eb9d0b10

Author: Mariefay

apps/webapp/app/env.server.ts

@@ -2442,7 +2442,7 @@ const EnvironmentSchema = z
     EVENTS_CLICKHOUSE_MAX_TRACE_DETAILED_SUMMARY_VIEW_COUNT: z.coerce.number().int().default(5_000),
     EVENTS_CLICKHOUSE_MAX_LIVE_RELOADING_SETTING: z.coerce.number().int().default(2000),
     EVENTS_CLICKHOUSE_TRACE_CHUNK_SIZE: z.coerce.number().int().positive().default(1_000),
-    EVENTS_CLICKHOUSE_MAX_TRACE_VIEW_COUNT: z.coerce.number().int().positive().default(250_000),
+    EVENTS_CLICKHOUSE_MAX_TRACE_VIEW_COUNT: z.coerce.number().int().positive().default(150_000),
 
     // OTLP ingest transform worker pool (opt-in). When enabled, decode/convert/enrich run in a
     // worker_threads pool instead of the request event loop; the single consolidated insert path

apps/webapp/app/hooks/useProgressiveTrace.ts

@@ -16,7 +16,7 @@ import {
 
 const MAX_CHUNK_ATTEMPTS = 3;
 const RETRY_BACKOFF_MS = 400;
-const MAX_PROGRESSIVE_SPANS = 250_000;
+const MAX_PROGRESSIVE_SPANS = 150_000;
 const BACKGROUND_CHUNK_SIZE = 10_000;
 const REBUILD_COALESCE_MS = 100;
 const TAIL_FETCH_TIMEOUT_MS = 15_000;

apps/webapp/app/v3/eventRepository/clickhouseEventRepository.server.ts

@@ -358,7 +358,7 @@ export class ClickhouseEventRepository implements IEventRepository {
   }
 
   get maximumTraceViewCount() {
-    return this._config.maximumTraceViewCount ?? 250_000;
+    return this._config.maximumTraceViewCount ?? 150_000;
   }
 
   get maximumErrorMatches() {