Harden async task flows and enhance analysis tooling

server/_core/env.ts

@@ -51,7 +51,13 @@ export const ENV = {
   llmMaxTokens: parseInteger(process.env.LLM_MAX_TOKENS, 32768),
   llmEnableThinking: parseBoolean(process.env.LLM_ENABLE_THINKING, false),
   llmThinkingBudget: parseInteger(process.env.LLM_THINKING_BUDGET, 128),
+  llmTimeoutMs: parseInteger(process.env.LLM_TIMEOUT_MS, 45000),
+  llmRetryCount: parseInteger(process.env.LLM_RETRY_COUNT, 1),
   mediaServiceUrl: process.env.MEDIA_SERVICE_URL ?? "",
+  mediaFetchTimeoutMs: parseInteger(process.env.MEDIA_FETCH_TIMEOUT_MS, 12000),
+  mediaFetchRetryCount: parseInteger(process.env.MEDIA_FETCH_RETRY_COUNT, 2),
+  youtubeApiKey: process.env.YOUTUBE_API_KEY ?? "",
   backgroundTaskPollMs: parseInteger(process.env.BACKGROUND_TASK_POLL_MS, 3000),
   backgroundTaskStaleMs: parseInteger(process.env.BACKGROUND_TASK_STALE_MS, 300000),
+  backgroundTaskHeartbeatMs: parseInteger(process.env.BACKGROUND_TASK_HEARTBEAT_MS, 5000),
 };