fix(iam): grant weekly-menu role execute-api invoke (#114)

oidc-deploy-roles.yaml

@@ -1383,9 +1383,9 @@ Resources:
   # Scoped runtime role for the meal-order-manager weekly-menu workflow
   # (Monday scrape + order-form publish). Deliberately narrower than the
   # repo's deploy role: the scheduled job reads stack outputs and app config,
-  # writes menu items and the published form, and invalidates the form's
-  # CloudFront path. It deploys nothing, so it gets no CloudFormation write
-  # actions, no PassRole, and no access outside the form bucket.
+  # invokes the IAM-authenticated publication API, writes the published form,
+  # and invalidates the form's CloudFront path. It deploys nothing, so it gets
+  # no CloudFormation write actions, no PassRole, and no DynamoDB access.
   MealOrderManagerWeeklyMenuRole:
     Type: AWS::IAM::Role
     Properties:
@@ -1432,12 +1432,15 @@ Resources:
                 Resource:
                   - !Sub arn:aws:ssm:us-east-1:${AWS::AccountId}:parameter/meal-order-manager/google-client-id
                   - !Sub arn:aws:ssm:us-east-1:${AWS::AccountId}:parameter/meal-order-manager/slack-channel-id
+              # Publication routes on the meal-order-manager HttpApi (API id
+              # b5mli7qgp3 is stable for the life of the stack). Menu/settings
+              # writes go through these IAM-authenticated routes, not DynamoDB.
               - Effect: Allow
                 Action:
-                  - dynamodb:GetItem
-                  - dynamodb:PutItem
+                  - execute-api:Invoke
                 Resource:
-                  - !Sub arn:aws:dynamodb:us-east-1:${AWS::AccountId}:table/meal-order-manager-orders
+                  - !Sub arn:aws:execute-api:us-east-1:${AWS::AccountId}:b5mli7qgp3/*/GET/api/publish/settings
+                  - !Sub arn:aws:execute-api:us-east-1:${AWS::AccountId}:b5mli7qgp3/*/POST/api/publish/menu
               - Effect: Allow
                 Action:
                   - s3:PutObject