Implement GET /v1/trades/{address} endpoint

[findolor]

Dependent PRs

• Implement GET /v1/trades/tx/{tx_hash} endpoint #39

Motivation

See issues:

• Implement GET /v1/trades/{address} #29
• Implement v1 Route Handlers #30

Add a paginated endpoint to retrieve all trades for a given owner address across all configured orderbooks, with optional time filtering.

Solution

• Implement GET /v1/trades/{address} with pagination (page, page_size) and optional time filters (start_time, end_time)
• Refactor TradesTxDataSource / RaindexTradesTxDataSource into a unified TradesDataSource / RaindexTradesDataSource trait that handles both trades-by-tx and trades-by-owner queries
• Update get_by_tx.rs to use the unified trait
• Update rain.orderbook submodule with owner trades queries, non-wasm constructors, and address casing fix for subgraph queries
• Add AGENTS.md rule: never modify submodule code directly
• Unit tests for success, empty results, query failure, auth, and bad config scenarios

Checks

By submitting this for review, I'm confirming I've done the following:

• made this PR as small as possible
• unit-tested any new functionality
• linked any relevant issues or PRs
• included screenshots (if this involves a front-end change)

fix #29

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✨ Finishing Touches

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• Create PR with unit tests
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• Commit unit tests in branch 2026-02-18-implement-trades-address

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