feat: Add uv Docker, Postgres, and company linking

Introduces uv-based Docker workflow with non-root runtime, cached installs, and uv-run for web and Celery. Updates docker-compose to Postgres + Redis, loads .env, and removes source bind mount for reproducible builds.

Switches settings to use Postgres when env is present with SQLite fallback; broadens allowed hosts for containerized development. Adds psycopg2-binary and updates sample env for Redis in Docker.

Adds company scoping to external data models and links sessions during ingestion; provides management commands to seed a Jumbo company/users and sync external chat data into the dashboard.

Includes .dockerignore, TypeScript config and typings, and minor template/docs tweaks.

Requires database migration.

docs/CELERY_REDIS.md

@@ -1,6 +1,7 @@
 # Redis and Celery Configuration
 
-This document explains how to set up and use Redis and Celery for background task processing in the LiveGraphs application.
+This document explains how to set up and use Redis and Celery for background task processing in the LiveGraphs
+application.
 
 ## Overview
 
@@ -72,7 +73,8 @@ Download and install from [microsoftarchive/redis](https://github.com/microsofta
 
 ### SQLite Fallback
 
-If Redis is not available, the application will automatically fall back to using SQLite for Celery tasks. This works well for development but is not recommended for production.
+If Redis is not available, the application will automatically fall back to using SQLite for Celery tasks. This works
+well for development but is not recommended for production.
 
 ## Configuration