Pin kitconcept.solr artifacts to the feature-ai-rag tip

Picks up kitconcept/kitconcept.solr#109 (solr-update-core-and-start no
longer overridden; conf refreshed on existing cores):

- backend: uv.lock refreshed, kitconcept-solr now locked to 826383b9
- frontend: volto-solr pinned by sha in mrs.developer.json instead of
  floating on the branch
- solr image: SOLR_TAG default changed from the floating feature-ai-rag
  tag to sha-826383b (verified present in ghcr, built from the merge
  commit by a green Solr image workflow run)

Author: reekitconcept

backend/news/+solr-pin-update-core.internal

@@ -0,0 +1 @@
+Update the kitconcept.solr pin to the feature-ai-rag tip, picking up solr-update-core-and-start no longer being overridden (kitconcept/kitconcept.solr#107). @reekitconcept

backend/uv.lock

@@ -97,7 +97,7 @@ services:
           - ${STACK_NAME}-tika
 
   solr:
-    image: ghcr.io/kitconcept/solr:${SOLR_TAG:-feature-ai-rag}
+    image: ghcr.io/kitconcept/solr:${SOLR_TAG:-sha-826383b}
     command:
       - solr-update-core-and-start
     environment:

devops/stacks/demo.yml

@@ -132,7 +132,7 @@ services:
           - ${STACK_NAME}-tika
 
   solr:
-    image: ghcr.io/kitconcept/solr:${SOLR_TAG:-feature-ai-rag}
+    image: ghcr.io/kitconcept/solr:${SOLR_TAG:-sha-826383b}
     command:
       - solr-update-core-and-start
     environment:

devops/stacks/persistent.yml

@@ -52,7 +52,7 @@ x-tika: &tika
     - 9998:9998
 
 x-solr: &solr
-  image: ghcr.io/kitconcept/solr:${SOLR_TAG:-feature-ai-rag}
+  image: ghcr.io/kitconcept/solr:${SOLR_TAG:-sha-826383b}
   platform: linux/amd64
   ports:
     - 8983:8983

docker-compose-dev.yml

@@ -135,7 +135,7 @@
     "url": "git@github.com:kitconcept/kitconcept.solr.git",
     "https": "https://github.com/kitconcept/kitconcept.solr.git",
     "path": "frontend/packages/volto-solr",
-    "branch": "feature-ai-rag"
+    "tag": "826383b96aa854ab787efc276320f2093422cc48"
   },
   "volto-contact-block": {
     "develop": true,

frontend/mrs.developer.json

@@ -0,0 +1 @@
+Pin volto-solr by sha in mrs.developer.json instead of floating on the feature-ai-rag branch (kitconcept/kitconcept.solr#107). @reekitconcept