fix(paperless): drop runtime apk add from fetch-bridge-cert

Owner directive: tools belong in the image, not installed at container
start. This init container ran `apk add --no-cache openssl` on EVERY
paperless pod start.

Unlike the multus CNI installer, this one genuinely needs an image: the
openssl CLI is absent from the alpine base (verified — the base carries the
libraries but not the command), and busybox has no `s_client` equivalent,
so the STARTTLS certificate capture cannot be done with what is already
there.

Adds ci/images/alpine-openssl, named for what it is rather than for this
consumer, so anything else needing s_client/x509 from a shell script can
reuse it.

Script logic is unchanged — only the apk add line is removed and the image
swapped.

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

.woodpecker/build-ci-images.yml

@@ -188,3 +188,32 @@ steps:
           --dockerfile Containerfile \
           --destination gitea.renner.uno/gitea_admin/cni-plugins:$TAG \
           --destination gitea.renner.uno/gitea_admin/cni-plugins:latest
+
+  # Runtime image, not CI tooling: alpine + the openssl CLI, for shell scripts
+  # needing s_client/x509. Named for what it is; first consumer is the paperless
+  # fetch-bridge-cert init container. Replaces an `apk add openssl` that ran on
+  # every paperless pod start. The openssl CLI is genuinely absent from the alpine
+  # base, so this one needs an image rather than a busybox substitute.
+  - name: build-alpine-openssl
+    image: gcr.io/kaniko-project/executor:v1.23.2-debug
+    directory: ci/images/alpine-openssl
+    depends_on: []
+    when:
+      - event: manual
+      - event: push
+        path: ["ci/images/alpine-openssl/**", ".woodpecker/build-ci-images.yml"]
+    environment:
+      GITEA_USER: gitea_admin
+      GITEA_TOKEN:
+        from_secret: ci_images_token
+    commands:
+      - mkdir -p /kaniko/.docker
+      - AUTH=$(printf '%s:%s' "$GITEA_USER" "$GITEA_TOKEN" | base64 | tr -d '\n')
+      - printf '{"auths":{"gitea.renner.uno":{"auth":"%s"}}}' "$AUTH" > /kaniko/.docker/config.json
+      - TAG=$(date +%Y-%m-%d)
+      - |
+        /kaniko/executor \
+          --context . \
+          --dockerfile Containerfile \
+          --destination gitea.renner.uno/gitea_admin/alpine-openssl:$TAG \
+          --destination gitea.renner.uno/gitea_admin/alpine-openssl:latest

ci/images/alpine-openssl/Containerfile

@@ -0,0 +1,21 @@
+FROM alpine:3.21@sha256:48b0309ca019d89d40f670aa1bc06e426dc0931948452e8491e3d65087abc07d
+
+# Alpine plus the openssl CLI. Nothing application-specific — named for what it
+# is, so anything needing `openssl s_client` / `x509` from a shell script can use
+# it.
+#
+# It exists because installing tools at container start is not acceptable here:
+# `apk add` makes every start depend on network and package-index availability,
+# and the resolved version can drift between restarts of an otherwise pinned
+# image.
+#
+# Note the openssl CLI is genuinely absent from the alpine base — verified, the
+# base carries the libraries but not the command — so unlike the multus CNI
+# installer (where busybox wget/tar already covered the need) this one really
+# does require an image rather than just dropping the apk add.
+#
+# First consumer: the paperless fetch-bridge-cert init container, which captures
+# the Proton Mail Bridge's self-signed IMAP certificate via STARTTLS and pins it
+# for paperless to trust. busybox has no s_client equivalent, so openssl is not
+# substitutable there.
+RUN apk add --no-cache openssl

kubernetes/apps/paperless/paperless.yaml

@@ -88,13 +88,17 @@ spec:
       # trust without disabling verification.
       initContainers:
         - name: fetch-bridge-cert
-          image: alpine:3.21
+          # alpine + the openssl CLI, built by .woodpecker/build-ci-images.yml
+          # from ci/images/alpine-openssl/. Replaces `apk add --no-cache openssl`
+          # on every paperless pod start: tools belong in the image, not
+          # installed at runtime. Dated tag so a change is a reviewable diff
+          # here, matching the ci-ansible / alpine-jq convention.
+          image: gitea.renner.uno/gitea_admin/alpine-openssl:2026-07-30
           command:
             - sh
             - -c
             - |
               set -e
-              apk add --no-cache openssl
               # Wait until the bridge presents a cert via STARTTLS.
               # Re-fetched on every paperless restart so a bridge cert
               # rotation only requires a paperless rollout to pick up.