Add comprehensive query key factory and cache invalidation helpers to @astroid/react

[Cjay-Cyber-2]

Description — what to implement and the why/impact.

Developers using @astroid/react with TanStack Query need structured query keys and cache invalidation helpers to manage agent states, policies, and wallet balances efficiently without manual key string concatenation.

Context & Requirements — background, constraints, design references, edge cases; grounded in the actual repo (real files, stack, conventions).

Implement a centralized query key factory pattern inside packages/react/src/ that generates consistent query keys for agents, wallets, policies, and budgets, along with typed invalidation helper functions.

Acceptance Criteria — a checklist ("- [ ] ...") of specific, testable conditions that define "done".

• Create a query key factory supporting all major resource domains (agents, wallets, policies, budgets).
• Provide helper functions to invalidate queries by resource type or specific ID.
• Ensure all React hooks in @astroid/react utilize the new query key factory.
• Add unit tests verifying query key structures and invalidation triggers.

Implementation Guidance — likely files/modules to touch (use real paths from the repo context) and a suggested approach, without over-prescribing.

Examine packages/react/src/ for existing hook implementations and TanStack Query setup. Adhere strictly to workspace TypeScript rules and avoid any.

Testing & Validation — how the contributor should prove it works (tests to add/run, manual checks, screenshots for UI).

Run pnpm test --filter @astroid/react and pnpm typecheck to validate hook types and test suites.

Submission Guidelines — must open a PR that includes "Closes #"; assignment is required before starting; follow the repo's existing style and conventions.

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Wave complexity: Medium