Change chain_id to chainId

Description

Fixes the bug in the trigger_caching function where the incorrect key (chain_id) was used instead of the correct key (chainId) to extract the chainId value from the request payload.

Is this PR related with an open issue?

Related to Issue Related to Issue 1097. The issue is located in the aquarius/app/assets.py file.

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] Follows the code style of this project.
• [ ] Tests Cover Changes
• [ ] Documentation

Hello @3xz1, on API.md check Valid body section. We need to update the table. In the table the parameters are with camelcase, but in Valid body it is shown as chain_id.