fix(ci): use full SHA in docker/metadata-action tags

The sha_tag output is a 40-char SHA, but docker/metadata-action
defaults to short (7-char) SHA tags. This caused UAT pods to fail
image pulls because kustomization tags didn't match GHCR tags.

Change type=sha,prefix=sha- to type=sha,prefix=sha-,format=long
in all four build jobs (cartsnitch, auth, receiptwitness, api).

Fixes CAR-482.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

.github/workflows/ci.yml

@@ -147,7 +147,7 @@ jobs:
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
           tags: |
-            type=sha,prefix=sha-
+            type=sha,prefix=sha-,format=long
             type=raw,value=${{ steps.calver.outputs.version }},enable=${{ github.ref == 'refs/heads/main' }}
             type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
 
@@ -217,7 +217,7 @@ jobs:
         with:
           images: ${{ env.REGISTRY }}/${{ env.AUTH_IMAGE_NAME }}
           tags: |
-            type=sha,prefix=sha-
+            type=sha,prefix=sha-,format=long
             type=raw,value=${{ steps.calver.outputs.version }},enable=${{ github.ref == 'refs/heads/main' }}
             type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
 
@@ -274,7 +274,7 @@ jobs:
         with:
           images: ${{ env.REGISTRY }}/${{ env.RECEIPTWITNESS_IMAGE_NAME }}
           tags: |
-            type=sha,prefix=sha-
+            type=sha,prefix=sha-,format=long
             type=raw,value=${{ steps.calver.outputs.version }},enable=${{ github.ref == 'refs/heads/main' }}
             type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
 
@@ -331,7 +331,7 @@ jobs:
         with:
           images: ${{ env.REGISTRY }}/${{ env.API_IMAGE_NAME }}
           tags: |
-            type=sha,prefix=sha-
+            type=sha,prefix=sha-,format=long
             type=raw,value=${{ steps.calver.outputs.version }},enable=${{ github.ref == 'refs/heads/main' }}
             type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}