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-076-scanner-ssrf-via-unvalidated-callbackurl.md

@@ -0,0 +1,39 @@
+---
+issue: 076
+title: "Scanner: SSRF via unvalidated callbackUrl on intent creation"
+severity: high
+domain: Scanner
+labels: [security, scanner, ssrf]
+status: open
+created: 2026-05-30
+source: Full Codebase Audit 2026-05-30
+---
+
+# Scanner: SSRF via unvalidated callbackUrl on intent creation
+
+**Severity:** high
+**Domain:** Scanner
+**Labels:** security, scanner, ssrf
+
+## Description
+
+`scanner/api.go:143` accepts a caller-supplied `callbackUrl` without validating the scheme, host, or whether it points to an internal/RFC-1918 address. A caller can set `callbackUrl` to any internal service URL and receive webhook deliveries from the scanner, enabling server-side request forgery.
+
+## Options
+
+1. Allowlist schemes (`https` only) and reject RFC-1918/link-local/loopback hosts at create time and at dial time via a custom `DialContext`.
+2. Restrict callbacks to a configured set of backend hostnames.
+3. Route webhooks through an egress proxy that blocks internal ranges.
+
+## Recommendation
+
+Enforce `https`-only + block private/loopback/link-local at both validation and dial time (custom `DialContext`), ideally plus a host allowlist.
+
+## Affected Files
+
+- `scanner/api.go:143`
+- `scanner/webhook.go` — dial path
+
+## References
+
+- [Full Codebase Audit 2026-05-30](../09%20-%20Audits/Full%20Codebase%20Audit%20-%202026-05-30.md) — DEC-57