A community based topic aggregation platform built on atproto

feat: Add database schema for phone verification master

Add privacy-first phone verification tables: - phone_verifications: Stores hashed phones only (HMAC-SHA256) - phone_verification_requests: Temporary OTP storage (10min TTL) - phone_verification_rate_limits: SMS abuse prevention - phone_verification_audit_log: Security monitoring Includes cleanup function for expired requests. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>


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