feat: enhance Cosmos transaction parsing to handle fees and tips as ancillary transactions

[vietddude]

Summary
Refine Cosmos semantic transaction parsing to focus on user-facing asset movements and stop emitting fee/tip side effects as standalone transactions.

What Changed

• Added fee filtering in Cosmos semantic parsing so native fee outflows are no longer emitted as separate transactions.
• Added tip filtering so tip_pay-related native transfers are also excluded from semantic transaction output.
• Added handling for chains/transactions that emit a combined ancillary native outflow equal to fee + tip, and strip that transfer before building semantic transactions.
• Kept TxFee populated from the real fee event; tip is not promoted to a separate semantic transaction.
• Refactored real Cosmos integration cases into a shared helper for reuse across tests.

Tests

• Added unit coverage for:
  • fee-only side-effect transfers
  • tip-only side-effect transfers
  • combined fee+tip ancillary transfers
• Added real-RPC integration coverage for Cosmos testnet tx FCC7183F43F150CC5B01E9F79FF3BB30B04153944039DB5AD428B9F8979789AA.
• Added a real-tx semantic count test across the current Cosmos sample hashes to verify each tx now resolves to exactly one semantic transaction.

Observed Real-Tx Results

• 10C90080AF071736C71F55130D672CB885DAC12963C4319D005420EF580706B7: 1 semantic tx
• A3264C9CA23F78669D4EF6C0ADC3178AF08F9B74E555B1E0480A716FF264B74E: 1 semantic tx
• 69F40A5F4E9BD58D5A5F30DBC4C53086D9080E703E77A44543807978207706B8: 1 semantic tx
• FCC7183F43F150CC5B01E9F79FF3BB30B04153944039DB5AD428B9F8979789AA: 1 semantic tx

Why
Cosmos events often include balance movements for fee and tip settlement. Those are valid low-level transfers, but they are not user-facing “big asset movement” transactions. This change narrows Cosmos semantic parsing so transaction history better reflects the primary asset movement while preserving fee metadata in TxFee.