Clarify UUIDv7 drift overflow semantics

[dexcompiler]

Summary

• apply CounterOverflowBehavior consistently when UUIDv7 logical time is ahead of physical time and the counter is exhausted
• pin ThrowException and SpinWait behavior for restored future max-counter state
• document drift/restored-state overflow behavior and update changelogs

Validation

• dotnet test tests/Clockworks.Tests.csproj --filter UuidV7FactoryTests -v minimal
• dotnet test property-tests/Clockworks.PropertyTests.fsproj --filter FullyQualifiedName~UuidV7FactoryProperties -v minimal
• dotnet test Clockworks.sln -v minimal -m:1
• npm run docs:build
• dotnet pack src/Clockworks.csproj -c Release -v minimal

Fixes #80

[dexcompiler]

@copilot review this pr

[Copilot]

@copilot review this pr

Reviewed at 6b7d99b.

I re-ran validation on this branch:

• dotnet test tests/Clockworks.Tests.csproj --filter UuidV7FactoryTests -v minimal ✅
• dotnet test property-tests/Clockworks.PropertyTests.fsproj --filter FullyQualifiedName~UuidV7FactoryProperties -v minimal ✅
• dotnet test Clockworks.sln -v minimal -m:1 ✅
• dotnet pack src/Clockworks.csproj -c Release -v minimal ✅
• docs build from the docs workspace (npm --prefix docs run docs:build) ✅

I did not find additional issues to change in this PR.