Enhance data integration and transcript parsing

- Improved date parsing in fetch_and_store_chat_data to support multiple formats and added error logging for unparseable dates.
- Enhanced parse_and_store_transcript_messages to handle empty transcripts and expanded message pattern recognition for both User and Assistant.
- Implemented intelligent splitting of transcripts based on detected patterns and timestamps, with fallback mechanisms for unrecognized formats.
- Updated documentation for Celery and Redis setup, troubleshooting, and project structure.
- Added markdown linting configuration and scripts for code formatting.
- Updated Nginx configuration to change the web server port.
- Added xlsxwriter dependency for Excel file handling in project requirements.

.pre-commit-config.yaml

@@ -57,6 +57,12 @@ repos:
         # types_or: [javascript, jsx, ts, tsx, css, scss, json, yaml, markdown]
         # exclude: '.*\.html$'
 
+  - repo: https://github.com/DavidAnson/markdownlint-cli2
+    rev: v0.18.1
+    hooks:
+      - id: markdownlint-cli2
+        args: [--fix]
+
   # Ruff for linting and formatting
   - repo: https://github.com/astral-sh/ruff-pre-commit
     rev: v0.11.10