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Implement prediction market SwapExecuted event pipeline (Slice 4) (#13390)

* feat: implement prediction market TokensMinted event pipeline

Add the EVM event pipeline for prediction market mint operations:
- Register TokensMinted event signature in eventSignatures.ts
- Export BinaryVault contract source with ABI from @commonxyz/common-protocol-abis
- Add predictionMarketTokensMintedMapper to decode raw EVM logs
- Extend PredictionMarketProjection with TokensMinted handler that
  inserts trades, upserts positions, and increments market total_collateral
- All DB mutations wrapped in a single Sequelize transaction
- Idempotent: duplicate events (same tx hash) skip position/market updates
- Add unit tests for mapper, projection handler, idempotency, and multi-user

Completed GitHub issue #13387

Co-Authored-By: Claude <noreply@anthropic.com>

* feat: implement prediction market SwapExecuted event pipeline

Completed GitHub issue #13389

Co-Authored-By: Claude <noreply@anthropic.com>

* fix: gate prediction market projection behind feature flag

Conditionally register PredictionMarketProjection in rascalConsumerMap
only when FLAG_FUTARCHY is enabled, preventing event consumption when
the feature is disabled.

Completed GitHub issue #13389

Co-Authored-By: Claude <noreply@anthropic.com>

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Co-authored-by: rotorsoft <rotorsoft@outlook.com>
Co-authored-by: Claude <noreply@anthropic.com>

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