Refactor transcript fetching and processing scripts

- Introduced a new function `fetchTranscriptContent` to handle fetching transcripts with optional authentication.
- Enhanced error handling and logging for transcript fetching.
- Updated the `parseTranscriptToMessages` function to improve message parsing logic.
- Replaced the old session processing logic with a new approach that utilizes `SessionImport` records.
- Removed obsolete scripts related to manual triggers and whitespace fixing.
- Updated the server initialization to remove direct server handling, transitioning to a more modular approach.
- Improved overall code structure and readability across various scripts.

lib/processingScheduler.ts

@@ -278,7 +278,7 @@ async function processSingleSession(session: any): Promise<ProcessingResult> {
         language: processedData.language,
         messagesSent: processedData.messages_sent,
         sentiment: sentimentMap[processedData.sentiment] || 0,
-        sentimentCategory: processedData.sentiment,
+        sentimentCategory: processedData.sentiment.toUpperCase() as "POSITIVE" | "NEUTRAL" | "NEGATIVE",
         escalated: processedData.escalated,
         forwardedHr: processedData.forwarded_hr,
         category: processedData.category,