implement kirills suggestion fix

[EugeneDrpc]

No description provided.

[Copilot]

Pull request overview

Adds a safety check in EthereumLowerBoundErrorHandler to skip lower-bound updates when the parsed tag exceeds the upstream's current head height (or when head height is unknown), preventing erroneous bound updates from malformed/oversized tag values (e.g. the referenced Base prod incident). Tests are updated accordingly.

Changes:

• Compare parsed tag against upstream.getHead().getCurrentHeight() before calling updateLowerBound, with warn logs for skip cases.
• Add unit tests for both new skip conditions (parsed exceeds head, head height null), plus a regression test for a Base incident value in the state handler.
• Update existing tests to mock Upstream.getHead() via a helper, and switch to mockito-kotlin mock.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
src/main/kotlin/io/emeraldpay/dshackle/upstream/error/EthereumLowerBoundErrorHandler.kt	Guards updateLowerBound with head-height check and adds warning logs.
src/test/kotlin/io/emeraldpay/dshackle/upstream/error/EthereumStateLowerBoundErrorHandlerTest.kt	Adds skip-condition tests and a Base-incident regression test; introduces mockUpstreamWithHead helper.
src/test/kotlin/io/emeraldpay/dshackle/upstream/error/EthereumTraceLowerBoundErrorHandlerTest.kt	Adds skip-condition tests and a mockUpstreamWithHead helper.

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