fix: eth_estimateGas failing with not enough funds for L1 fee

[exeokan]

Description

When the "from" address has a low balance, eth_estimateGas was failing because we were inspecting the transaction with non zero L1 fee rate.
This PR fixes the issue by executing with a zero L1 fee rate, and then computing the l1 fee in the handler using the l1 diff from execution.

Testing

Added test_estimate_gas_no_balance.

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.6%. Comparing base (61b10a9) to head (8467585).

Files with missing lines	Patch %	Lines
crates/evm/src/query.rs	50.0%	8 Missing ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
...overeign-sdk/full-node/db/sov-schema-db/src/lib.rs	78.0% <ø> (ø)
crates/evm/src/query.rs	90.7% <50.0%> (+0.5%)	⬆️

... and 7 files with indirect coverage changes

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[Copilot]

Pull request overview

Fixes eth_estimateGas failing for low-/zero-balance from addresses by preventing L1 fee charging during the EVM simulation, while still returning an l1_fee estimate computed from the execution’s recorded L1 diff size.

Changes:

• Run eth_estimateGas simulations with l1_fee_rate = 0 to avoid "Not enough funds for L1 fee" failures during inspection.
• Recompute l1_fee in the RPC handler using tx_info.l1_diff_size * real_l1_fee_rate (instead of relying on tx_info.l1_fee produced by a zero-fee simulation).
• Add test_estimate_gas_no_balance to cover estimateGas behavior when from has zero balance.

Reviewed changes

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

File	Description
crates/evm/src/query.rs	Adjusts estimate gas execution to simulate with zero L1 fee rate and recompute L1 fee from l1_diff_size.
crates/evm/src/tests/queries/estimate_gas_tests.rs	Adds a regression test ensuring eth_estimateGas succeeds for zero-balance from (except value transfers).

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