fix: removed txs from test wallet

[glevco]

Motivation

We noticed that the wallet.get_balance_per_address() method was not working correctly in the end of the reward lock event simulation — it was not considering the removed tx. This PR fixes this.

Acceptance Criteria

• Add voidance assertion in _remove_transactions().
• Prevent event processing from reloading metadata.
• Add CONSENSUS_TX_REMOVED event handling on test wallet.
• Add typing to test_reward_lock.py.
• Add balance and voidance assertions in reward lock test and event simulation scenario.

Checklist

• If you are requesting a merge into master, confirm this code is production-ready and can be included in future releases as soon as it gets merged

[github-actions]

Bencher Report

Branch	fix/wallet-removed-tx
Testbed	ubuntu-22.04

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Benchmark	Latency	Benchmark Result nanoseconds (ns) (Result Δ%)	Lower Boundary nanoseconds (ns) (Limit %)	Upper Boundary nanoseconds (ns) (Limit %)
sync-v2 (up to 20000 blocks)	📈 view plot 🚷 view threshold	101,446,853,776.88 (-0.54%)	91,802,408,704.46 (90.49%)	112,202,943,972.12 (90.41%)

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.29%. Comparing base (115569a) to head (067de83).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1139      +/-   ##
==========================================
- Coverage   84.40%   84.29%   -0.12%     
==========================================
  Files         317      317              
  Lines       24297    24303       +6     
  Branches     3697     3698       +1     
==========================================
- Hits        20508    20485      -23     
- Misses       3072     3091      +19     
- Partials      717      727      +10     

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