chore(grype): suppress zlib CVE-2026-85091 until base images ship the fix (#12970)

.grype.yaml

@@ -126,3 +126,18 @@ ignore:
   - vulnerability: CVE-2026-82049
     package:
       name: python
+
+  # zlib in the Alpine base images of the UI (node:24.18.1-alpine) and MCP
+  # (python:3.13.14-alpine3.23) containers. CVE-2026-85091 is a heap overflow in
+  # gz_vacate() reached only through non-blocking gzwrite() followed by gzprintf() after
+  # a write stall. Node links its own bundled zlib and the MCP server never writes gzip
+  # files, so neither image calls that path. TEMPORARY: the 1.3.2-r1 fix is in the
+  # Alpine index and could be taken with `apk add --upgrade`, but we wait for the base
+  # images to ship it instead (the newest node:24-alpine and python:3.13-alpine3.23 still
+  # carry 1.3.2-r0). Pinned to that version so the rule stops matching on its own once a
+  # base image moves forward. Remove when the base digests are bumped, by 2026-11-07.
+  # https://security.alpinelinux.org/vuln/CVE-2026-85091
+  - vulnerability: CVE-2026-85091
+    package:
+      name: zlib
+      version: 1.3.2-r0