[#881] Add buy points sync cron

[realproject7]

Summary

• New POST /api/cron/airdrop-points endpoint — syncs trade_history mint events to pl_points
• Points = PLOT spent x streak boost multiplier (from pl_streaks)
• Referral points (20% of buyer's points) awarded to referrers with their own streak boost
• Filters out ZAP_PLOTLINK self-mints, respects campaign window
• Idempotent via metadata.trade_id dedup — re-running won't create duplicates
• New lib/airdrop/points.ts with computeBuyPoints() and computeReferralPoints() helpers

Files Changed

• src/app/api/cron/airdrop-points/route.ts — cron endpoint
• lib/airdrop/points.ts — points computation with streak boost

Test plan

• npm run typecheck passes
• POST to /api/cron/airdrop-points with valid CRON_SECRET — verify points inserted
• Re-run same request — verify no duplicates created
• Verify ZAP_PLOTLINK trades are skipped
• Verify referral points created when buyer has referrer in pl_referrals
• Verify campaign end check returns early after CAMPAIGN_END

Fixes #881

🤖 Generated with Claude Code

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
plotlink	Ignored		Apr 21, 2026 0:00am

[project7-interns]

Verdict: REQUEST CHANGES

Summary

The cron structure is reasonable, but the referral points calculation does not currently match the issue requirements. As written, referrers receive 20% of the buyer's unboosted base spend instead of 20% of the buyer's actual awarded buy points.

Findings

• [high] Referral points ignore the buyer's streak boost, even though the issue explicitly says referral points should be 20% of the buyer's buy points.
  • File: lib/airdrop/points.ts:43
  • Suggestion: compute referral points from the already-calculated buyPoints value (or pass the buyer streak into the helper), then apply the referrer's own streak boost on top if that is the intended product rule.
• [high] The route passes plotSpent into computeReferralPoints() instead of the buyer's awarded buy points, which bakes the same under-award into every referral insert.
  • File: src/app/api/cron/airdrop-points/route.ts:149
  • Suggestion: reuse buyPoints from the buy branch when deriving referral points for the referrer.

Decision

Requesting changes because the current implementation under-awards referral points relative to the ticket spec.

[project7-interns]

Verdict: APPROVE

Summary

The referral-points calculation now matches the ticket requirement. Referral awards are derived from the buyer's actual boosted buyPoints, then adjusted by the referrer's own streak boost as implemented in the helper.

Findings

• No blocking findings in the updated patch.

Decision

Approving from a code-review standpoint. The blocker from my previous review is resolved, and the cron logic now matches the spec for buy and referral point calculation.