ContextStore

Storage layer abstraction for tool execution context.

This interface defines the storage contract for context objects. It supports two retrieval modes:

• By type only: get(Class<T>) - suitable for singleton scenarios

• By key + type: get(String, Class<T>) - suitable for multi-instance scenarios

This design allows handling both simple cases (one UserContext) and complex cases (multiple UserContext instances for different users).

Implementations can be:

• Simple in-memory Map storage (DefaultContextStore)

• Custom storage stores (Redis, database, etc.)

Example usage:

`// Single instance per type
DatabaseConfig config = store.get(DatabaseConfig.class);

// Multiple instances of same type
UserContext admin = store.get("admin", UserContext.class);
UserContext guest = store.get("guest", UserContext.class);
`