Conventions batch 4: env blocks, homeassistant className default, strict clusterIssuer

- apache-tika, gotenberg, cyberchef, homeassistant, patchmon: additive env
  value blocks rendered through tpl (value, secretKeyRef and configMapKeyRef
  forms), following the template-chart/outline pattern; patchmon gets separate
  blocks for the server container and the guacd sidecar.
- homeassistant: ingress.className now defaults to nginx; an empty className
  omits ingressClassName from the rendered Ingress, so the flexible upstream
  ingress style stays intact.
- outline, paperless-ngx: remove the ingress.clusterIssuer defaults
  (letsencrypt / letsencrypt-issuer) - the value is now strictly required,
  consistent with the repo-wide ingress standard; CI test-values set it
  explicitly.

Chart bumps: apache-tika 7.2.0, gotenberg 4.2.0, cyberchef 5.2.0,
patchmon 5.2.0, homeassistant 4.2.0 (minor); outline 5.0.0,
paperless-ngx 10.0.0 (major).

patchmon/templates/patchmon.deployment.yaml

@@ -143,6 +143,26 @@ spec:
             - name: GUACD_ADDRESS
               value: "127.0.0.1:4822"
             {{- end }}
+            {{- range $value := .Values.patchmon.server.env }}
+            {{- if $value.value }}
+            - name: {{ $value.name | quote }}
+              value: {{ tpl $value.value $ | quote }}
+            {{- else if $value.valueFrom }}
+            {{- if $value.valueFrom.secretKeyRef }}
+            - name: {{ $value.name }}
+              valueFrom:
+                secretKeyRef:
+                  name: {{ tpl $value.valueFrom.secretKeyRef.name $ | quote }}
+                  key: {{ tpl $value.valueFrom.secretKeyRef.key $ | quote }}
+            {{- else if $value.valueFrom.configMapKeyRef }}
+            - name: {{ $value.name }}
+              valueFrom:
+                configMapKeyRef:
+                  name: {{ tpl $value.valueFrom.configMapKeyRef.name $ | quote }}
+                  key: {{ tpl $value.valueFrom.configMapKeyRef.key $ | quote }}
+            {{- end }}
+            {{- end }}
+            {{- end }}
           # Probe values are rendered through tpl (see values.yaml for the
           # defaults and why the probes send a Host header).
           livenessProbe:
@@ -162,6 +182,29 @@ spec:
         - name: {{ .Release.Name }}-{{ .Chart.Name }}-guacd
           image: {{ .Values.patchmon.guacd.image }}
           imagePullPolicy: IfNotPresent
+          {{- if .Values.patchmon.guacd.env }}
+          env:
+            {{- range $value := .Values.patchmon.guacd.env }}
+            {{- if $value.value }}
+            - name: {{ $value.name | quote }}
+              value: {{ tpl $value.value $ | quote }}
+            {{- else if $value.valueFrom }}
+            {{- if $value.valueFrom.secretKeyRef }}
+            - name: {{ $value.name }}
+              valueFrom:
+                secretKeyRef:
+                  name: {{ tpl $value.valueFrom.secretKeyRef.name $ | quote }}
+                  key: {{ tpl $value.valueFrom.secretKeyRef.key $ | quote }}
+            {{- else if $value.valueFrom.configMapKeyRef }}
+            - name: {{ $value.name }}
+              valueFrom:
+                configMapKeyRef:
+                  name: {{ tpl $value.valueFrom.configMapKeyRef.name $ | quote }}
+                  key: {{ tpl $value.valueFrom.configMapKeyRef.key $ | quote }}
+            {{- end }}
+            {{- end }}
+            {{- end }}
+          {{- end }}
           securityContext:
             {{- toYaml .Values.patchmon.guacd.securityContext.container | nindent 12 }}
           ports: