Fix new ads excluded by the 100-creative serving limit

[ralyodio]

The ad selector queried only 100 ready creatives per format before running its auction. With 374 eligible campaigns in production, the newest campaigns were excluded from every format's candidate pool despite being active with ready creatives. Older campaigns continued recording impressions.

Load the complete eligible pool using ordered ID pagination, then run the existing auction. If an inventory page fails, log the failure and use the house ad instead of auctioning an incomplete pool. This requires no database migration.

Validation:

• Full suite: 2,396 passed, 9 skipped; TypeScript checks passed.
• Serving regressions verify impression recording for candidates beyond 100 and 1,000 rows, an exact page boundary, and a failed later page. All three large-pool cases fail against the original selector.
• Read-only production verification: the patched loader includes all 374 eligible terminal creatives, including the newest campaign excluded by the deployed query. No production impressions were generated by the verification.

Not deployed. Loading full inventory increases the candidate payload; the current 374-row pool fits in a single 500-row page.

[github-actions]

ThreatCrush Security Scan

48 finding(s)

HIGH/CRITICAL: 2 | MEDIUM: 31 | LOW: 15

Severity	Rule	Location
HIGH	tls-verification-disabled	lib/onion.ts:48
HIGH	secret-generic-credential	lib/sp/platforms/facebook.ts:32
MEDIUM	js-unescaped-html-sink	app/(app)/dashboard/admin/email-broadcast/EmailBroadcastForm.tsx:125
MEDIUM	js-unescaped-html-sink	app/(app)/dashboard/projects/[id]/autoblog/articles/[articleId]/page.tsx:214
MEDIUM	js-unescaped-html-sink	app/(marketing)/blog/[slug]/page.tsx:67
MEDIUM	js-unescaped-html-sink	app/(marketing)/blog/[slug]/page.tsx:97
MEDIUM	js-unescaped-html-sink	app/(marketing)/blog/[slug]/page.tsx:104
MEDIUM	js-unescaped-html-sink	app/(marketing)/blog/[slug]/page.tsx:110
MEDIUM	js-unescaped-html-sink	app/(marketing)/recent/page.tsx:186
MEDIUM	js-unescaped-html-sink	app/(marketing)/recent/page.tsx:190
MEDIUM	js-unescaped-html-sink	app/c/[project]/[slug]/page.tsx:77
MEDIUM	js-unescaped-html-sink	app/c/[project]/page.tsx:57
MEDIUM	js-unescaped-html-sink	app/careers.js/route.ts:228
MEDIUM	js-unescaped-html-sink	app/careers.js/route.ts:285
MEDIUM	js-unescaped-html-sink	app/layout.tsx:129
MEDIUM	js-open-redirect	app/login/form.tsx:39
MEDIUM	js-unescaped-html-sink	app/r/[token]/page.tsx:176
MEDIUM	js-open-redirect	app/signup/form.tsx:43
MEDIUM	js-open-redirect	components/billing/buy-credits-modal.tsx:98
MEDIUM	js-unescaped-html-sink	components/json-ld.tsx:8
MEDIUM	js-unescaped-html-sink	components/report/markdown-view.tsx:15
MEDIUM	js-unescaped-html-sink	lib/careers/page-templates.ts:198
MEDIUM	js-dynamic-code-execution	lib/crawl-limits.ts:67
MEDIUM	redos-nested-quantifier	lib/emailMarkdown.ts:41
MEDIUM	redos-nested-quantifier	lib/emailMarkdown.ts:324
MEDIUM	redos-nested-quantifier	lib/lx/articleGen.ts:99
MEDIUM	redos-nested-quantifier	lib/tracker/agent-gate.ts:61
MEDIUM	sh-remote-script-execution	prober/deploy/provision.sh:30
MEDIUM	sql-template-interpolation	scripts/detect-slot-themes.ts:31
MEDIUM	sql-template-interpolation	scripts/purge-constructed-keywords.ts:163
MEDIUM	sql-template-interpolation	scripts/purge-offniche-keywords.ts:124
MEDIUM	js-dynamic-code-execution	scripts/test-crawl-limits.mjs:14
MEDIUM	js-dynamic-code-execution	scripts/test-crawl-limits.mjs:24
LOW	secret-generic-credential	app/(marketing)/docs/autoblog-webhook/page.tsx:145
LOW	secret-generic-credential	lib/sp/platforms/linkedin.ts:25
LOW	js-dynamic-code-execution	tests/careers-page-templates.test.ts:21
LOW	js-dynamic-code-execution	tests/careers-widget-script.test.ts:19
LOW	js-dynamic-code-execution	tests/careers-widget-script.test.ts:69
LOW	js-dynamic-code-execution	tests/contract/ad-visitor-id.test.ts:51
LOW	js-dynamic-code-execution	tests/contract/ad-visitor-id.test.ts:52
LOW	js-dynamic-code-execution	tests/contract/ads-click-cooldown-redis.test.ts:20
LOW	js-dynamic-code-execution	tests/contract/ads-click-cooldown-redis.test.ts:24
LOW	js-dynamic-code-execution	tests/contract/ads-click-cooldown-redis.test.ts:25
LOW	js-dynamic-code-execution	tests/contract/ads-click-cooldown-redis.test.ts:26
LOW	js-dynamic-code-execution	tests/contract/ads-click-cooldown-redis.test.ts:31
LOW	js-dynamic-code-execution	tests/contract/ads-click-cooldown-redis.test.ts:35
LOW	secret-generic-credential	tests/contract/posthog-integration.test.ts:13
LOW	secret-generic-credential	tests/lead-campaign.test.ts:16

Snippets are redacted; ThreatCrush never prints matched credential material.