Update URI for Stamps and Metadata

[erichfi]

User Story:

As a developer,
I want the URIs for stamps and stamp metadata to be updated,
So that I can adhere to the new object-oriented design principles.

Acceptance Criteria

GIVEN the existing URIs for stamps and stamp metadata,
WHEN developers update to the new API version,
THEN the URIs should reflect the new structure.

Product & Design Links:

N/A

Tech Details:

• Update the following URIs:
  • Old: GET /registry/stamps/{address}
  • New: GET /v2/stamps/{address}
  • Old: GET /registry/stamp-metadata
  • New: GET /v2/stamps/metadata

Open Questions:

N/A

Notes/Assumptions:

• This aligns with the new object-oriented API design principles.