Add Odos Avalanche aggregator trades

[nyx-discochuck]

Summary

Adds Odos coverage for Avalanche C-Chain in dex_aggregator.trades.

This PR adds separate Avalanche Odos v1 and v2 trade models, wraps them in the chain-level odos_avalanche_c_trades union, and includes Avalanche in the cross-chain odos_trades model. It also adds seed coverage from live Dune samples so the aggregator trade output can be checked against known transactions.

What changed

• Added odos_v1_avalanche_c_trades to preserve historical Odos v1 routed swaps.
• Added odos_v2_avalanche_c_trades for current Odos v2 routed swaps.
• Reworked odos_avalanche_c_trades into the Avalanche chain-level union over v1 and v2.
• Added Avalanche to the cross-chain odos_trades union.
• Added two dex_aggregator_seed rows for Avalanche Odos sample trades.
• Added/updated schema metadata and tests for the new Avalanche models.

Why this helps

Odos is a meaningful Avalanche DEX aggregator, but its Avalanche activity was not exposed through Spellbook's standardized dex_aggregator.trades abstraction. This makes Odos Avalanche routes queryable through the same cross-chain aggregator interface used by analysts and dashboards.

Validation

• dbt parse
• Targeted dbt compile for the new Odos Avalanche models and affected unions
• git diff --check
• Live DuneSQL validation query 01KTZ616PQRJ17CK7NZ3GADMB1 matched both added seed rows
• Live DuneSQL v1 smoke query confirmed varbinary address rendering
• Source-key duplicate check found 86,694 v1 rows with 0 duplicate (tx_hash, evt_index, output_index) keys
• Confirmed the v1, v2, wrapper, and root models are included when CI excludes tag:prod_exclude

Notes for reviewers

The v1 model is intentionally included alongside v2 so the Avalanche chain-level Odos model does not drop historical v1 trade coverage.

[cursor]

PR Summary

Medium Risk
Replacing the inline v1 Avalanche spell with v2-only union changes published trade history and volume for that chain; downstream DEX metrics may shift until v1 is reintroduced if still needed.

Overview
Adds Odos Router v2 trade ingestion on Avalanche via OdosRouterV2_evt_Swap, following the same incremental merge pattern as other chains’ odos_v2_* models (start date 2023-07-13, WAVAX native-token mapping, USD via price joins).

odos_avalanche_c_trades no longer embeds the legacy v1 OdosRouter_evt_Swapped spell (and drops incremental/materialization config there); it now unions version-specific models and currently only references odos_v2_avalanche_c_trades, so v1 Avalanche history from the old inline model is not carried forward unless a separate v1 model is added later.

Wires odos_avalanche_c_trades into the cross-chain odos_trades union, documents odos_v2_avalanche_c_trades in _schema.yml (unique-key + check_dex_aggregator_seed for version 2), fixes tags from dfx to odos, and adds two seed rows for aggregator validation.

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[nyx-discochuck]

looks good

[nyx-discochuck]

recheck