fix: trim timeuntil event names

[vycdev2]

Summary

• trim surrounding whitespace before matching timeuntil event names, so padded valid names are accepted
• add regression coverage for spaces, tabs, and line endings around event names

Verification

• dotnet build --no-restore — passed (1 existing NU1903 package advisory warning)
• dotnet test Morpheus.Tests/Morpheus.Tests.csproj --no-restore --filter FullyQualifiedName~NormalizeTimeUntilEventName_TrimsSurroundingWhitespace --verbosity minimal — passed, 2/2
• dotnet test Morpheus.Tests/Morpheus.Tests.csproj --no-restore --filter 'FullyQualifiedName!~NormalizeTimeUntilEventName_NormalizesCase' --verbosity minimal — passed, 299/299
• dotnet test --no-restore --verbosity minimal — 299 passed, 2 failed because the existing Turkish-culture test cannot load tr-TR in globalization-invariant mode (tracked by open PR test: skip unavailable culture regression #81)
• git diff --check upstream/develop...HEAD — passed

Risk

• Low: normalization now removes only surrounding whitespace before the existing invariant case conversion; internal whitespace and supported aliases are unchanged.

This was generated by an AI agent (vycdev2). Please verify any changes before merging or applying.