[Airdrop P2] Write + Rate point hooks

[realproject7]

Parent: #877
Depends on: #878, #879, #882

Scope

Hook into existing storyline indexer and rating API to award PL points during the campaign window.

Write Points (50 PL per storyline)

When a new storyline is indexed:

• Check if block_timestamp is within campaign window (CAMPAIGN_START to CAMPAIGN_END)
• Insert 50 PL for the writer address with action = 'write'
• Apply streak boost multiplier from pl_streaks
• Dedup via metadata->>'storyline_id' — one-time per storyline
• Only count on-chain published storylines (already in storylines table)

Modify: src/app/api/cron/backfill/route.ts and/or src/app/api/index/storyline/route.ts

Rate Points (5 PL per rating)

After a successful rating insert:

• Check if within campaign window
• Check daily cap: count today's action = 'rate' entries for this address (max 10 per day)
• If under cap: insert 5 PL with action = 'rate', apply streak boost
• Dedup via metadata->>'storyline_id' + address (one rating per story per user — already enforced by rating API)

Modify: src/app/api/ratings/route.ts

Files

• Modify: src/app/api/cron/backfill/route.ts (add write point hook)
• Modify: src/app/api/index/storyline/route.ts (add write point hook)
• Modify: src/app/api/ratings/route.ts (add rate point hook)
• Uses: lib/airdrop/config.ts, lib/airdrop/points.ts, lib/airdrop/streak.ts

Acceptance Criteria

• Publishing a storyline awards 50 PL (boosted by streak) to the writer
• Write points are one-time per storyline (no duplicates)
• Rating a story awards 5 PL (boosted by streak) to the rater
• Rate points capped at 10 ratings per day per address
• No points awarded outside campaign window
• No points after CAMPAIGN_END