chore: bump @enbox/* deps to latest published versions

[LiranCohen]

Summary

• Bumps all @enbox/* dependencies to latest published versions (post monorepo refactor)
• Pins all versions to exact (removes caret ranges for consistency)
• No code changes needed — gitd does not use any of the removed/renamed APIs

Version bumps

Package	From	To
@enbox/agent	^0.3.1	0.5.0
@enbox/api	^0.4.2	0.5.0
@enbox/auth	^0.3.1	0.6.0
@enbox/crypto	0.0.6	0.1.0
@enbox/dids	0.0.7	0.1.0
@enbox/dwn-sdk-js	0.1.0	0.2.0
@enbox/dwn-sql-store	0.0.9	0.0.12

Build verified locally (bun run build passes).

[LiranCohen]

Closing as stale. main already uses newer @enbox/* dependency versions than this March PR, so merging it now would downgrade the package set and lockfile rather than update them.