Generate comprehensive GitHub Copilot instructions for mem-db-utils repository

[Copilot]

Created a comprehensive .github/copilot-instructions.md file that provides GitHub Copilot coding agents with detailed instructions for working effectively in the mem-db-utils codebase.

The instructions include:

Validated Commands & Timing

• All commands have been manually tested and include actual timing measurements
• Explicit timeout recommendations with "NEVER CANCEL" warnings for operations that may take longer
• Unit tests: python -m pytest tests/ -v (20 passed, 5 skipped in ~0.4s)
• Linting: ruff check . && ruff format --check . (~0.01s each)
• Coverage testing with 83.61% coverage reporting

Complete Validation Scenarios

• Step-by-step manual testing procedures for database connectivity
• Full integration testing with Docker Redis containers
• Environment variable configuration requirements (DB_URL is mandatory)
• Validation of set/get/delete operations with real database connections

Database Integration Support

• Docker commands for setting up Redis, Memcached, Dragonfly, and Valkey
• Database-specific testing instructions with connection examples
• Support for multiple database types with automatic protocol detection
• Redis Sentinel configuration guidance

Comprehensive Troubleshooting

• Common issues and solutions including import errors and network timeouts
• Network dependency documentation (custom PyPI index at pypi.prismatica.in)
• Database connection troubleshooting with Docker commands
• Memory and performance considerations (uses __slots__ for efficiency)

Development Workflow

• Repository structure overview with key file locations
• CI/CD pipeline documentation referencing actual GitHub workflows
• Pre-commit hooks and code quality standards
• Package building and distribution guidance

All instructions follow an imperative tone ("Run this command", "Do not do this") and provide exhaustive validation steps that ensure any developer can copy-paste commands and have them work correctly every time.

Fixes #7.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• astral.sh
  • Triggering command: curl -LsSf REDACTED (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[Copilot]

Pull Request Overview

This PR creates comprehensive GitHub Copilot instructions for the mem-db-utils repository, providing coding agents with detailed guidance for working effectively in the codebase. The instructions include validated commands with timing measurements, complete validation scenarios, database integration support, and troubleshooting guidance.

Key Changes:

• Added detailed development workflow instructions with tested commands and actual timing measurements
• Provided comprehensive database integration support for Redis, Memcached, Dragonfly, and Valkey
• Included step-by-step validation scenarios and troubleshooting documentation

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