tracking should be optional in dbt configuration (#769)

* tracking should be optional in dbt configuration

* black formatting

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Co-authored-by: Sung Won Chung <[email protected]>

Author: eschrock

data_diff/dbt_config_validators.py

@@ -6,8 +6,8 @@
 class ManifestJsonConfig(BaseModel):
     class Metadata(BaseModel):
         dbt_version: str = Field(..., regex=r"^\d+\.\d+\.\d+([a-zA-Z0-9]+)?$")
-        project_id: str
-        user_id: str
+        project_id: Optional[str]
+        user_id: Optional[str]
 
     class Nodes(BaseModel):
         class Config(BaseModel):