Support quoting.snowflake_ignore_case

Closes #11882.

Author: aksestok

.changes/unreleased/Features-20250821-092532.yaml

@@ -0,0 +1,6 @@
+kind: Features
+body: No-op when project-level `quoting.snowflake_ignore_case` is set.
+time: 2025-08-21T09:25:32.049328307+02:00
+custom:
+    Author: aksestok
+    Issue: "11882"

core/dbt/contracts/project.py

@@ -38,6 +38,7 @@ class Quoting(dbtClassMixin, Mergeable):
     database: Optional[bool] = None
     project: Optional[bool] = None
     identifier: Optional[bool] = None
+    snowflake_ignore_case: Optional[bool] = None
 
 
 @dataclass
@@ -396,6 +397,7 @@ class ConfiguredQuoting(Quoting):
     schema: bool = True
     database: Optional[bool] = None
     project: Optional[bool] = None
+    snowflake_ignore_case: Optional[bool] = None
 
 
 @dataclass

core/dbt/include/jsonschemas/project/0.0.110.json

@@ -514,6 +514,12 @@
             "boolean",
             "null"
           ]
+        },
+        "snowflake_ignore_case": {
+          "type": [
+            "boolean",
+            "null"
+          ]
         }
       },
       "additionalProperties": false

tests/unit/config/test_project.py

@@ -153,7 +153,7 @@ def test_all_overrides(self):
                 "asset-paths": ["other-assets"],
                 "clean-targets": ["another-target"],
                 "packages-install-path": "other-dbt_packages",
-                "quoting": {"identifier": False},
+                "quoting": {"identifier": False, "snowflake_ignore_case": True},
                 "models": {
                     "pre-hook": ["{{ logging.log_model_start_event() }}"],
                     "post-hook": ["{{ logging.log_model_end_event() }}"],
@@ -214,7 +214,7 @@ def test_all_overrides(self):
         self.assertEqual(project.asset_paths, ["other-assets"])
         self.assertEqual(project.clean_targets, ["another-target"])
         self.assertEqual(project.packages_install_path, "other-dbt_packages")
-        self.assertEqual(project.quoting, {"identifier": False})
+        self.assertEqual(project.quoting, {"identifier": False, "snowflake_ignore_case": True})
         self.assertEqual(
             project.models,
             {