fix(eth/filters): return -32602 when exceeding the block range limit #34647

[gzliudan]

Proposed changes

Ref: ethereum#34647

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[Copilot]

Pull request overview

This PR aligns eth/filters range-limit failures with JSON-RPC semantics by returning an Invalid params RPC error (code -32602) when a log query exceeds the configured block range limit.

Changes:

• Replace the plain fmt.Errorf range-limit error in Filter.Logs with an RPC-compatible invalidParamsErr (code -32602).
• Update TestRangeLimit to assert both RPC error code -32602 and the exact error message.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
eth/filters/filter.go	Returns an RPC invalid-params error when the requested block span exceeds rangeLimit.
eth/filters/filter_test.go	Strengthens the test to verify the returned error is an rpc.Error with code -32602 and the expected message.