[Attestation Service] Improve SMS Coverage and SMS Providers

[codyborn]

Context

This epic serves to coordinate our efforts (among others):

• to improve our SMS country coverage for the phone number verification flow
• to coordinate investigations into country-level success rates

Previous Epics

Previous epics relating to "SMS Coverage and SMS Providers":

• [Attestation Service] Measure and Improve SMS Carrier Success Rate#7369

Housekeeping

@arthurgousset: Check if I can close

• [x] Switch to Verify API for SMS Providers#7947
• [x] Investigate design for wallet support for Verify API#8081

[0xarthurxyz]

@codyborn: I'm repurposing this Epic to coordinate our SMS country coverage efforts and investigations. Please ping me if this is not ok (i.e. I'm breaking something).

[0xarthurxyz]

Added tickets documenting @eelanagaraj's work on:

• feature: local signing (via keystores)
• feature: fallback node support

[github-actions[bot]]

This issue is stale and will be closed in 30 days without activity