Database layer for LLM Registry

This crate provides database persistence for the LLM Registry system, including:

• Connection pool management with deadpool
• Repository trait abstractions for assets
• PostgreSQL implementation with SQLx
• Event store for audit trails and event sourcing
• Database migrations
• Comprehensive error handling

Features

• Compile-time verified queries: Using SQLx macros for type-safe SQL
• Connection pooling: Efficient connection management with configurable pools
• Transaction support: ACID guarantees for multi-step operations
• Event sourcing: Complete audit trail of all registry operations
• Flexible search: Full-text search and filtering capabilities
• Dependency tracking: Graph-based dependency management with cycle detection

Example

use llm_registry_db::{PoolConfig, create_pool, PostgresAssetRepository};
use llm_registry_core::Asset;

// Create a connection pool
let config = PoolConfig::new("postgres://localhost/llm_registry")
    .max_connections(10);
let pool = create_pool(&config).await?;

// Create repository
let repo = PostgresAssetRepository::new(pool);

// Use the repository
// let asset = repo.create(my_asset).await?;