Add wallet balance history endpoint

[Akatenvictor]

What

Add a user wallet balance history endpoint that returns a chronological list of balance changes with transaction details.

Why

Artists and users need a clear audit trail of their wallet activity. Currently there is no way to view historical balance changes through the API.

Scope

• In: Balance history endpoint with pagination, transaction type filtering, date range filtering
• Out: Export to CSV/PDF, balance projections, multi-token support

Acceptance Criteria

• GET /api/wallet/history returns chronological balance changes
• Filter by transaction type: payout, purchase, upload reward
• Filter by date range (from, to query params)
• Pagination with page and limit params
• Each entry includes: amount, type, description, timestamp, related song/album ID
• Response includes running balance calculation

Technical Context

• WalletController in src/controllers/ for history endpoint
• WalletService logic or new WalletHistoryService in src/services/
• TransactionLog entity in src/entities/TransactionLog is the data source
• TransactionLogService in src/services/TransactionLogService for querying
• walletRoutes in src/routes/ for route registration