fix(api): drop health 400 responses the routes never return

.redocly.lint-ignore.yaml

@@ -7,3 +7,10 @@ packages/api/openapi/paths/auth-login.yaml:
 packages/api/openapi/paths/auth-callback.yaml:
   operation-4xx-response:
     - '#/get/responses'
+# Health returns 200. Ready returns 200 or 503. Neither returns 4xx.
+packages/api/openapi/paths/health.yaml:
+  operation-4xx-response:
+    - '#/get/responses'
+packages/api/openapi/paths/ready.yaml:
+  operation-4xx-response:
+    - '#/get/responses'

packages/api/openapi/paths/health.yaml

@@ -15,14 +15,3 @@ get:
           example:
             stage: local
             sha: deadbeef
-    "400":
-      description: Bad request.
-      content:
-        application/json:
-          schema:
-            $ref: ../components/schemas.yaml#/Error
-          example:
-            error:
-              code: VALIDATION_ERROR
-              message: Bad request.
-              correlationId: 11111111-1111-4111-8111-111111111111

packages/api/openapi/paths/ready.yaml

@@ -15,17 +15,6 @@ get:
           example:
             status: ok
             database: up
-    "400":
-      description: Bad request.
-      content:
-        application/json:
-          schema:
-            $ref: ../components/schemas.yaml#/Error
-          example:
-            error:
-              code: VALIDATION_ERROR
-              message: Bad request.
-              correlationId: 11111111-1111-4111-8111-111111111111
     "503":
       description: Database ping failed.
       content: