Completed backend intern assignment including conversation summaries,PostgreSQL migration, scheduled cleanup, and file upload/list/delete APIs with duplicate prevention –jayaramknss@gmail.com

[Jayaramkandukuri]

This PR includes the complete implementation of the assigned backend tasks.

Task 1: Basic Setup & Simple Feature

• Configured development environment and successfully ran the application.
• Added summary-related fields to the Conversation model.
• Implemented automatic conversation summary generation and storage.
• Updated Django Admin to display summary status, freshness, and related metadata.

Task 2: Database Migration & Data Management

• Migrated database from SQLite to PostgreSQL.
• Implemented a custom Django management command to clean up old conversations.
• Configured periodic execution of the cleanup task using scheduled background processing.

Task 3: API Development & Integration

• Developed conversation summary API with:
• Pagination support
• Filtering (has_summary, is_stale, search)
• Implemented secure file upload endpoint.
• Added file duplication prevention using file hashing.
• Created endpoint to list uploaded files with metadata.
• Implemented file deletion functionality (removes both database record and stored file).

Test Results

**Updated Django Admin to display summary status, freshness, and related metadata.**

Migrated database from SQLite to PostgreSQL.

Implemented a custom Django management command to clean up old conversations.
Configured periodic execution of the cleanup task using scheduled background processing.

**Developed conversation summary API with: - Pagination support - Filtering (has_summary, is_stale, search)** **Created endpoint to list uploaded files with metadata.** **Added file duplication prevention using file hashing.** **Implemented file deletion functionality (removes both database record and stored file).**