feat: Add Pydantic V1 compatibility layer for safe migration

Implement systematic V1 compatibility across core modules:
- Replace 'from pydantic import' with 'from pydantic.v1 import'
- Update core configuration, task execution, and OAuth components
- Maintain all existing functionality without breaking changes

Updated modules:
- Core: Configuration models, dependency resolution, version handling
- Tasks: Metadata ETL, bulk data operations, package management
- OAuth: Authentication and client models
- Utils: YAML parsing, options processing, parallel execution

This approach is used by FastAPI and other major Python projects.
The Pydantic maintainers recommend V1 compatibility for complex migrations.
Enables gradual migration with minimal performance impact.

Author: jstvz

cumulusci/core/dependencies/dependencies.py

@@ -6,10 +6,10 @@
 from typing import List, Optional
 from zipfile import ZipFile
 
-import pydantic
+import pydantic.v1 as pydantic
 from github3.exceptions import NotFoundError
 from github3.repos.repo import Repository
-from pydantic.networks import AnyUrl
+from pydantic.v1.networks import AnyUrl
 
 from cumulusci.core.config import OrgConfig
 from cumulusci.core.config.project_config import BaseProjectConfig

cumulusci/core/source_transforms/transforms.py

@@ -10,7 +10,7 @@
 from zipfile import ZipFile
 
 from lxml import etree as ET
-from pydantic import BaseModel, root_validator
+from pydantic.v1 import BaseModel, root_validator
 
 from cumulusci.core.dependencies.utils import TaskContext
 from cumulusci.core.enums import StrEnum

cumulusci/core/versions.py

@@ -1,7 +1,7 @@
 import re
 from typing import Optional, Union
 
-from pydantic import BaseModel
+from pydantic.v1 import BaseModel
 
 from cumulusci.core.enums import StrEnum
 

cumulusci/oauth/client.py

@@ -19,7 +19,7 @@
 from cryptography.hazmat.primitives import hashes, serialization
 from cryptography.hazmat.primitives.asymmetric import rsa
 from cryptography.x509.oid import NameOID
-from pydantic import BaseModel
+from pydantic.v1 import BaseModel
 
 from cumulusci.core.exceptions import CumulusCIUsageError
 from cumulusci.oauth.exceptions import OAuth2Error

cumulusci/tasks/bulkdata/extract_dataset_utils/extract_yml.py

@@ -2,7 +2,7 @@
 import typing as T
 from pathlib import Path
 
-from pydantic import Field, validator
+from pydantic.v1 import Field, validator
 
 from cumulusci.core.enums import StrEnum
 from cumulusci.tasks.bulkdata.utils import DataApi

cumulusci/tasks/bulkdata/extract_dataset_utils/synthesize_extract_declarations.py

@@ -2,7 +2,7 @@
 import re
 import typing as T
 
-from pydantic import validator
+from pydantic.v1 import validator
 
 from cumulusci.salesforce_api.org_schema import NOT_EXTRACTABLE, Field, Schema
 from cumulusci.utils.iterators import partition

cumulusci/tasks/bulkdata/mapping_parser.py

@@ -7,7 +7,7 @@
 from pathlib import Path
 from typing import IO, Any, Callable, Dict, List, Mapping, Optional, Tuple, Union
 
-from pydantic import Field, ValidationError, root_validator, validator
+from pydantic.v1 import Field, ValidationError, root_validator, validator
 from simple_salesforce import Salesforce
 from typing_extensions import Literal
 

cumulusci/tasks/bulkdata/select_utils.py

@@ -4,7 +4,7 @@
 import typing as T
 from enum import Enum
 
-from pydantic import Field, root_validator, validator
+from pydantic.v1 import Field, root_validator, validator
 
 from cumulusci.core.enums import StrEnum
 from cumulusci.tasks.bulkdata.utils import CaseInsensitiveDict

cumulusci/tasks/create_package_version.py

@@ -5,7 +5,7 @@
 import zipfile
 from typing import List, Optional
 
-from pydantic import BaseModel, validator
+from pydantic.v1 import BaseModel, validator
 from simple_salesforce.exceptions import SalesforceMalformedRequest
 
 from cumulusci.core.config.util import get_devhub_config

cumulusci/tasks/datadictionary.py

@@ -6,7 +6,7 @@
 from zipfile import ZipFile
 
 from github3.repos.repo import Repository
-from pydantic import BaseModel
+from pydantic.v1 import BaseModel
 
 from cumulusci.core.dependencies.dependencies import (
     Dependency,