[Operator] Post-deploy verification — env vars, backfill cursor, E2E test

[realproject7]

Summary

Post-deploy operator tasks after StoryFactory v4 redeploy and PLOT token launch.

Vercel Environment Variables

• NEXT_PUBLIC_CONTRACT_ADDRESS → 0x92c3bd44fda84e632c3c3cb31387d0c0c1de618d
• NEXT_PUBLIC_CHAIN_ID → 8453
• Verify NEYNAR_API_KEY is still set
• Verify NEXT_PUBLIC_BUILDER_CODE is still bc_oif14flv

Supabase

• Run migration 00023 (backfill cursor reset)
• Run migration 00024 (clean up pre-PLOT data)
• Verify backfill_cursor has deployment block 43824789 for both id=1 and id=2
• Run migrations 00021 + 00022 (notification tables)

Post-Deploy Verification

• Trigger Vercel redeploy (PR [#543] Post-deploy updates — migrations, versioning rules, queue #544)
• Basescan verified for both contracts
• Create test storylines (Korean + English) and verify full flow
• Trade via Zap with ETH works
• Price chart shows J-curve shape

Acceptance Criteria

• All Vercel env vars updated
• Backfill cursor initialized
• DB cleaned of old factory data
• Test storylines created and full flow verified
• Both contracts verified on Basescan

[realproject7]

Post-deploy verification complete via Batch 19 E2E test. StoryFactory redeployed to 0x9D2AE1E99D0A6300bfcCF41A82260374e38744Cf during testing (symbol collision fix). Cleanup in #549.