ERC20 wallet contract hour merge key

[dot2dotseurat]

Brief comments on the purpose of your changes:
Updates erc20 hourly agg model to match the merge key pattern updated in erc20 daily agg

For Dune Engine V2
I've checked that:

• I tested the query on dune.com after compiling the model with dbt compile (compiled queries are written to the target directory)
• I used "refs" to reference other models in this repo and "sources" to reference raw or decoded tables
• if adding a new model, I added a test
• the filename is unique and ends with .sql
• each sql file is a select statement and has only one view, table or function defined
• column names are lowercase_snake_cased

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