audit: 2026-05-30 full-codebase audit — report, issues, docs, runbooks

Full-codebase-audit 2026-05-30 outputs:
- Audit report: 09 - Audits/Full Codebase Audit - 2026-05-30.md
- 81 issue files ISSUE-055..135 (decisions + 1 skipped no-brainer).
- Scanner docs from scratch (was zero): architecture, data model, API ref, payment
  flow, operations runbook + repo README.
- Doc-sync updates across API reference, data models, flows, design system.
- Secret Rotation Runbook (08 - Operations) for the exposed credentials.
- Reusable workflow guide (07 - Development) + .claude/workflows/full-codebase-audit.js.

Issues remain status:open intentionally — the code fixes are uncommitted-then-committed
working-tree changes per repo and aren't "resolved" until merged/deployed.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Issues/ISSUE-111-scanner-deliverwebhook-goroutines-use-blocking-time-sleep.md

@@ -0,0 +1,39 @@
+---
+issue: 111
+title: "Scanner: deliverWebhook goroutines use blocking time.Sleep — goroutine leak under sustained failure"
+severity: medium
+domain: Scanner
+labels: [bug, scanner, goroutine-leak]
+status: open
+created: 2026-05-30
+source: Full Codebase Audit 2026-05-30
+---
+
+# Scanner: deliverWebhook goroutines use blocking time.Sleep — goroutine leak under sustained failure
+
+**Severity:** medium
+**Domain:** Scanner
+**Labels:** bug, scanner, goroutine-leak
+
+## Description
+
+`scanner/webhook.go:90` spawns a goroutine per webhook delivery that uses `time.Sleep` for retry backoff. Under sustained backend failure, many goroutines accumulate blocking on sleep with no upper bound on their count or total memory usage.
+
+## Options
+
+1. Replace per-delivery sleeping goroutines with a persisted retry queue + ticker (already partially present).
+2. Use a bounded worker pool + context cancellation instead of `time.Sleep`.
+3. Cap concurrent in-flight deliveries with a semaphore.
+
+## Recommendation
+
+Move retries to the persisted queue/ticker model with a bounded worker pool and context-aware delays. Coordinate with ISSUE-112.
+
+## Affected Files
+
+- `scanner/webhook.go:90`
+
+## References
+
+- [Full Codebase Audit 2026-05-30](../09%20-%20Audits/Full%20Codebase%20Audit%20-%202026-05-30.md) — DEC-67
+- [[ISSUE-112-scanner-unbounded-goroutine-fan-out-for-webhook-retries|ISSUE-112]]