v0.11.5 DirectStorage and decompression improvements

[wefalltomorrow]

Summary

• protect detected DirectStorage game roots by default, with a Settings override
• infer game roots from common launcher/library layouts and Unreal Engine DirectStorage layouts
• add storage-aware parallel decompression while keeping the HDD single-worker safeguard
• add Decompress + exclude so restored folders can be kept out of future compression
• add WOF availability preflight checks before compression/decompression
• coalesce high-frequency status/summary UI updates
• finalize version, changelog, and lockfile for v0.11.5

Validation

• Windows x64 release build passes with --locked
• embedded JavaScript syntax validation passes
• all 25 Rust tests pass
• release artifact uploads successfully
• Cargo.lock retains the existing dependency checksums; only the local package version changes to 0.11.5

Merged for v0.11.5 release.