Bump 33 apps to latest upstream versions

Patch/minor bumps:
- akaunting: 3.1.21 -> 3.2.3
- aptly: 1.6.2 -> 1.6.3
- baserow: 2.2.2 -> 2.4.1
- crowdsec: v1.7.8 -> v1.8.1
- docker-registry: 3.0.0 -> 3.1.2
- etherpad: 2.2.7 -> 2.6.1
- headlamp: v0.42.0 -> v0.46.0
- headscale: 0.29.1 -> 0.29.5
- indico: 3.3.12 -> 3.3.14
- karrot: v17.4.1 -> v17.4.2
- keila: 0.17.1 -> 0.30.3
- lemmy: 0.19.15 -> 0.19.19
- loomio: 3.0.24 -> 3.12.0
- mastodon: 4.5.3 -> 4.7.3
- mautic: 7.1.2 -> 7.2.1
- memcached: 1.6.32 -> 1.6.45
- mobilizon: 5.2.3 -> 5.2.4
- nocodb: 2026.04.1 -> 2026.09.1
- open-webui: 0.9.5 -> 0.12.3
- outline: 1.8.1 -> 1.11.0
- peertube: 8.2.1 -> 8.2.4
- pixelfed: 0.12.7 -> 0.15.1
- pretix: 2026.5.1 -> 2026.8.0
- synapse: v1.144.0 -> v1.163.0
- traefik: v3.4.1 -> v3.7.16
- typebot: 3.17.1 -> 3.19.1
- vaultwarden: 1.37.1 -> 1.37.4
- writefreely: 0.15.1 -> 0.17.2

Multi-file updates for apps with workers/sidekiq/streaming:
- mastodon (5 files), indico (3 files), karrot (4 files),
  lemmy (2 files), loomio (2 files), typebot (2 files),
  pixelfed (2 files), synapse (2 refs), pretix (2 refs),
  aptly (2 refs)

lemmy/versions/0/deployment-backend.yaml

@@ -65,7 +65,7 @@ spec:
           mountPath: /config
       containers:
       - name: backend
-        image: dessalines/lemmy:0.19.15
+        image: dessalines/lemmy:0.19.19
         securityContext:
           allowPrivilegeEscalation: false
           capabilities:

lemmy/versions/0/deployment-ui.yaml

@@ -21,7 +21,7 @@ spec:
           type: RuntimeDefault
       containers:
       - name: ui
-        image: dessalines/lemmy-ui:0.19.15
+        image: dessalines/lemmy-ui:0.19.19
         securityContext:
           allowPrivilegeEscalation: false
           capabilities:

lemmy/versions/0/manifest.yaml

@@ -1,4 +1,4 @@
-version: 0.19.15-4
+version: 0.19.19
 requires:
 - name: postgres
 - name: smtp