Member campaigns now go out as click offers on DripOffers

Third syndication rail. The first two send impressions; this one sends
clicks — a real person picks the offer off the offerwall, goes to the
member's link, and has to stay the dwell time before anyone is paid.

Two things it does that the other rails can't:

- It carries geo-targeted campaigns. DripOffers filters on an explicit
  country list, so a campaign aimed at Tier 1 finally reaches an outside
  audience instead of staying on our own site. Tier-3-only campaigns are
  skipped rather than quietly sent worldwide, because an inclusion list
  can't express "everywhere except the other tiers" and widening it would
  deliver exactly the traffic the owner chose to exclude.
- Delivery is counted, not derived. It reads rows from the platform's
  permanent click ledger. It never computes delivery as ordered minus
  remaining, and pausing never zeroes remaining — that pair is what
  charged members for impressions that never ran on Network Ad Space.

Also fixes two live bugs found while wiring it: the AdRevLinks pause was
nested inside the Network Ad Space check in both the end sweep and
setStatus, so with NAS switched off an ended or paused campaign kept
running on AdRevLinks. Each rail is now checked on its own.

Caps: 1,000 credits minimum, 10,000 clicks maximum per campaign. Not for
cost — Marty owns the platform and these placements are free — but because
the whole site delivers around 2,700 clicks a day, and one campaign
booking 50,000 would sit in the list for weeks.

Inert unless DRIPOFFERS_BRIDGE_URL and _KEY are set. 26 checks green
against the live endpoint; member walk clean.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

db.js

@@ -120,6 +120,7 @@ async function bootstrap() {
   await alterSafe('ALTER TABLE campaigns ADD COLUMN height INT NULL');  // banner size (IAB) → also NAS height
   await alterSafe('ALTER TABLE campaigns ADD COLUMN nas_ad_id INT NULL');          // syndicated NAS sponsorads.ID
   await alterSafe('ALTER TABLE campaigns ADD COLUMN nas_served INT NOT NULL DEFAULT 0'); // NAS impressions already reconciled into spend
+  await alterSafe('ALTER TABLE campaigns ADD COLUMN drip_id INT NULL');            // syndicated DripOffers campaigns.id (2026-09-18)
   await alterSafe('ALTER TABLE campaigns ADD COLUMN expires BIGINT NULL'); // featured rotation end time
   await alterSafe('ALTER TABLE campaigns ADD COLUMN starts BIGINT NULL');  // featured run start (booked day); any type: scheduled start
   await q(`CREATE TABLE IF NOT EXISTS camp_hours (