API Migration to Passport.xyz and API v2

[erichfi]

Proposal:

• https://docs.google.com/document/d/1BtEdSK2_4YZK8gSfZRBN7T3vZmITg15ctm0BUfEEdUI/edit#heading=h.3xrm1phm687f

Feature Requests:

• Update Base URL to https://api.passport.xyz/ with Migration Support #2928
• Version Path Element Introduction #2929
• Endpoint for Retrieving Model Scores #2930
• Bulk Model Score Retrieval Endpoint #2931
• Optional Parameter skip_refresh #2932
• Retire Submission Endpoint #2933
• Update URI for Stamps and Metadata #2934

[lebraat]

FYI -- Gerald and I have a meeting scheduled for tomorrow to unblock this work.

Also, I hadn't originally intended on including any adjustments to the MBD API as part of this work. We should discuss whether it is time to graduate this endpoint from beta into V2. Would love your thoughts!