Add deterministic contract version metadata and release manifest

[grantfox-oss]

The contract package lacks a discoverable release manifest or deterministic version metadata, making it hard to correlate deployed WASM artifacts with source code and contract schemas.

Affected areas: app/contract/contracts/Cargo.toml, app/contract/contracts//src/lib.rs, app/contract/contracts/src/metadata.rs, CI workflows, backend contract registry.

Implementation scope:

• Add contract version metadata and build-time manifest generation.
• Embed version, build timestamp, source hash, and schema version in the WASM artifact.
• Make the backend registry consume the manifest for deployment and compatibility checks.
• Add tests to verify manifest contents and contract version invariants.

Acceptance criteria:

• Every built contract artifact includes deterministic metadata.
• Backend and CI can verify the deployed artifact against source metadata.
• Version drift is detectable by automated checks.

[Tobi-8]

oh this is super easy, i have experience in this.
allow me to work on this issue

[dzekojohn4]

assign me this

[grantfox-oss]

🦊 GrantFox — @dzekojohn4 has been assigned to this issue as part of the Official Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #33)
2. Your PR will be reviewed by the BlockDash-Studios maintainers

Good luck! Track your progress on GrantFox.

[Noble-Devbase]

can i work on this

[grantfox-oss]

🦊 GrantFox — @Noble-Devbase has been assigned to this issue as part of the Official Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #33)
2. Your PR will be reviewed by the BlockDash-Studios maintainers

Good luck! Track your progress on GrantFox.