add: config client-error-verbosity to set error verbosity

Set error verbosity using this config. The verbosity can
be set to `verbose` or `minimal` for client error responses.

This only affects client side HTTP responses, server side logs
are not affected by this config.

Signed-off-by: Taimoor Zaeem <taimoorzaeem@gmail.com>

test/io/test_io.py

@@ -1757,3 +1757,35 @@ def test_server_timing_transaction_duration(defaultenv, metapostgrest):
         ]
 
         assert 2000 <= response_dur < 3000
+
+
+def test_client_error_verbosity_config(defaultenv):
+    "Test PostgREST errors with different error verbosity settings"
+
+    env = {
+        **defaultenv,
+        "PGRST_CLIENT_ERROR_VERBOSITY": "minimal",  # hide details and hint
+    }
+
+    with run(env=env) as postgrest:
+        response = postgrest.session.get("/itemsxx")
+        assert response.status_code == 404
+        assert response.json() == {
+            "code": "PGRST205",
+            "message": "Could not find the table 'public.itemsxx' in the schema cache",
+        }
+
+    env = {
+        **defaultenv,
+        "PGRST_CLIENT_ERROR_VERBOSITY": "verbose",
+    }
+
+    with run(env=env) as postgrest:
+        response = postgrest.session.get("/itemsxx")
+        assert response.status_code == 404
+        assert response.json() == {
+            "code": "PGRST205",
+            "message": "Could not find the table 'public.itemsxx' in the schema cache",
+            "details": None,
+            "hint": "Perhaps you meant the table 'public.items'",
+        }