Add VersionRegistry capability-flag bitmap to versioning.rs

[greatest0fallt1me]

Description

Clients currently query version() and have to map each version to known capabilities by hand. Add a capabilities(): u64 bitmap that names features (BatchClaim, TWAPOracle, SlashableMisbehavior, etc.) so clients can probe what is available without a version lookup table.

Requirements and Context

• Define Capability constants in versioning.rs
• Emit CapabilitiesUpdated event on upgrade
• Cover with a test that asserts every shipped feature flips its bit
• Must be secure, tested, and documented
• Should be efficient and easy to review

Suggested Execution

1. Fork the repo and create a branch

   git checkout -b feature/version-capability-bitmap

2. Implement changes
   • contracts/predictify-hybrid/src/versioning.rs
   • contracts/predictify-hybrid/src/tests/capability_bitmap_tests.rs
3. Test and commit
   • cargo test -p predictify-hybrid capability_bitmap
   • Cover edge cases
   • Include test output and notes in the PR

Example commit message

feat: expose capability bitmap via versioning::capabilities()

Acceptance Criteria

• Bitmap exposed via a new public view entrypoint
• At least four capability bits are defined and tested
• Event emitted whenever bitmap changes

Guidelines

• Clear documentation and inline comments
• Real Soroban SDK idioms in any new helper code
• Timeframe: 96 hours

[Immaculate0606]

@Immaculate0606 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Please kindly assign to me. I’d love to work on this

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Immaculate0606 to this issue.

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Congratulations, @Immaculate0606! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

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[drips-wave]

This issue has been completed by @Immaculate0606 as part of the Stellar Wave Program's 6th Wave 🥳

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