fuzz v1 and fix

[qiweiii]

No description provided.

[github-actions]

The changes introduce a new copying mechanism for state, which is a good improvement. However, there are several issues with the implementation. A key issue is the incorrect handling of mutable state in the new copy initializer for ServiceAccountsMutRef, which leads to shared mutable state instead of a true copy. Additionally, there's a potentially incorrect clearing of state changes in Accumulation.swift and some inefficient lazy initialization patterns have been introduced in HostCalls.swift.

[github-actions]

Found a mutability/shadowing bug when building a dictionary in Bless, and an unsafe force-cast plus aliasing of mutable state in ServiceAccounts copy initializer.

[github-actions]

No issues found

[codecov]

Codecov Report

❌ Patch coverage is 27.44186% with 156 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.74%. Comparing base (0a75453) to head (10e3011).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
Fuzzing/Sources/Fuzzing/FuzzingTarget.swift	0.00%	89 Missing ⚠️
Fuzzing/Sources/Fuzzing/FuzzingClient.swift	0.00%	36 Missing ⚠️
Fuzzing/Sources/Fuzzing/Messages.swift	0.00%	20 Missing ⚠️
...ces/Blockchain/RuntimeProtocols/Guaranteeing.swift	27.27%	8 Missing ⚠️
.../Blockchain/VMInvocations/HostCall/HostCalls.swift	76.92%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #368      +/-   ##
==========================================
- Coverage   81.96%   81.74%   -0.22%     
==========================================
  Files         381      381              
  Lines       33758    33912     +154     
==========================================
+ Hits        27670    27723      +53     
- Misses       6088     6189     +101     

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[github-actions]

Found multiple correctness and robustness issues in the changed code, including a likely compile error in HostCalls optional binding and logic regression, inconsistent error handling between target and client, a forced unwrap that can crash, and a potentially incorrect use of try on a non-throwing initializer.