#40 Rename request id to state id, secure state id

[martti007]

• Changed certification request structure.
• Request signature is now calculated from H(CBOR([source state hash, transaction hash]))
• Changed Request ID name to State ID
• State Id can now be calculated from certification request

[Copilot]

Pull request overview

This PR refactors the certification system by renaming "Request ID" to "State ID" and restructuring how certification requests are signed. The signature is now calculated from H(CBOR([source state hash, transaction hash])) instead of the previous approach, and the State ID can now be derived from the certification request itself.

Key Changes:

• Renamed RequestId class to StateId with updated calculation logic
• Replaced Authenticator and LeafValue classes with new CertificationData class
• Updated certification request/response structure with new CertificationRequest, CertificationResponse, and CertificationStatus classes
• Modified InclusionProof to use CertificationData instead of separate authenticator and transaction hash fields

Reviewed changes

Copilot reviewed 61 out of 61 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
StateId.java	New file implementing State ID with updated calculation using CBOR encoding
CertificationData.java	New file replacing Authenticator, containing certification information and signature
CertificationRequest.java	New request structure for certification submissions
CertificationResponse.java	New response structure with optional receipt support
CertificationStatus.java	New enum with expanded status codes for certification outcomes
InclusionProof.java	Updated to use CertificationData and verify method signature changes
Commitment.java	Refactored to use CertificationData instead of RequestId and Authenticator
AggregatorClient.java	Updated interface methods to use new certification structures
Multiple test files	Updated tests to use new StateId and CertificationData classes
README.md	Updated documentation with new class names

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