This enables ruff ARG001 for EEST:

• chore: unused arguments #2166

For parity with execution-specs, we'll have to enable all ARG checks.

This command:

 uv run ruff check src tests --statistics

ran on top of #2166 gives this summary of the remaining errors:

196	ARG003	unused-class-method-argument
 99	ARG002	unused-method-argument
  1	ARG005	unused-lambda-argument
Found 296 errors.