feat(mcp): implement Git Operations MCP server with Gitea provider

Implements the Git Operations MCP server (Issue #58) providing:

Core features:
- GitPython wrapper for local repository operations (clone, commit, push, pull, diff, log)
- Branch management (create, delete, list, checkout)
- Workspace isolation per project with file-based locking
- Gitea provider for remote PR operations

MCP Tools (17 registered):
- clone_repository, git_status, create_branch, list_branches
- checkout, commit, push, pull, diff, log
- create_pull_request, get_pull_request, list_pull_requests
- merge_pull_request, get_workspace, lock_workspace, unlock_workspace

Technical details:
- FastMCP + FastAPI with JSON-RPC 2.0 protocol
- pydantic-settings for configuration (env prefix: GIT_OPS_)
- Comprehensive error hierarchy with structured codes
- 131 tests passing with 67% coverage
- Async operations via ThreadPoolExecutor

Closes: #105, #106, #107, #108, #109

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

mcp-servers/git-ops/__init__.py

@@ -0,0 +1,179 @@
+"""
+Git Operations MCP Server.
+
+Provides git repository management, branching, commits, and PR workflows
+for Syndarix AI agents.
+"""
+
+__version__ = "0.1.0"
+
+from config import Settings, get_settings, is_test_mode, reset_settings
+from exceptions import (
+    APIError,
+    AuthenticationError,
+    BranchExistsError,
+    BranchNotFoundError,
+    CheckoutError,
+    CloneError,
+    CommitError,
+    CredentialError,
+    CredentialNotFoundError,
+    DirtyWorkspaceError,
+    ErrorCode,
+    GitError,
+    GitOpsError,
+    InvalidRefError,
+    MergeConflictError,
+    PRError,
+    PRNotFoundError,
+    ProviderError,
+    ProviderNotFoundError,
+    PullError,
+    PushError,
+    WorkspaceError,
+    WorkspaceLockedError,
+    WorkspaceNotFoundError,
+    WorkspaceSizeExceededError,
+)
+from models import (
+    BranchInfo,
+    BranchRequest,
+    BranchResult,
+    CheckoutRequest,
+    CheckoutResult,
+    CloneRequest,
+    CloneResult,
+    CommitInfo,
+    CommitRequest,
+    CommitResult,
+    CreatePRRequest,
+    CreatePRResult,
+    DiffHunk,
+    DiffRequest,
+    DiffResult,
+    FileChange,
+    FileChangeType,
+    FileDiff,
+    GetPRRequest,
+    GetPRResult,
+    GetWorkspaceRequest,
+    GetWorkspaceResult,
+    HealthStatus,
+    ListBranchesRequest,
+    ListBranchesResult,
+    ListPRsRequest,
+    ListPRsResult,
+    LockWorkspaceRequest,
+    LockWorkspaceResult,
+    LogRequest,
+    LogResult,
+    MergePRRequest,
+    MergePRResult,
+    MergeStrategy,
+    PRInfo,
+    ProviderStatus,
+    ProviderType,
+    PRState,
+    PullRequest,
+    PullResult,
+    PushRequest,
+    PushResult,
+    StatusRequest,
+    StatusResult,
+    UnlockWorkspaceRequest,
+    UnlockWorkspaceResult,
+    UpdatePRRequest,
+    UpdatePRResult,
+    WorkspaceInfo,
+    WorkspaceState,
+)
+
+__all__ = [
+    # Version
+    "__version__",
+    # Config
+    "Settings",
+    "get_settings",
+    "reset_settings",
+    "is_test_mode",
+    # Error codes
+    "ErrorCode",
+    # Exceptions
+    "GitOpsError",
+    "WorkspaceError",
+    "WorkspaceNotFoundError",
+    "WorkspaceLockedError",
+    "WorkspaceSizeExceededError",
+    "GitError",
+    "CloneError",
+    "CheckoutError",
+    "CommitError",
+    "PushError",
+    "PullError",
+    "MergeConflictError",
+    "BranchExistsError",
+    "BranchNotFoundError",
+    "InvalidRefError",
+    "DirtyWorkspaceError",
+    "ProviderError",
+    "AuthenticationError",
+    "ProviderNotFoundError",
+    "PRError",
+    "PRNotFoundError",
+    "APIError",
+    "CredentialError",
+    "CredentialNotFoundError",
+    # Enums
+    "FileChangeType",
+    "MergeStrategy",
+    "PRState",
+    "ProviderType",
+    "WorkspaceState",
+    # Dataclasses
+    "FileChange",
+    "BranchInfo",
+    "CommitInfo",
+    "DiffHunk",
+    "FileDiff",
+    "PRInfo",
+    "WorkspaceInfo",
+    # Request/Response models
+    "CloneRequest",
+    "CloneResult",
+    "StatusRequest",
+    "StatusResult",
+    "BranchRequest",
+    "BranchResult",
+    "ListBranchesRequest",
+    "ListBranchesResult",
+    "CheckoutRequest",
+    "CheckoutResult",
+    "CommitRequest",
+    "CommitResult",
+    "PushRequest",
+    "PushResult",
+    "PullRequest",
+    "PullResult",
+    "DiffRequest",
+    "DiffResult",
+    "LogRequest",
+    "LogResult",
+    "CreatePRRequest",
+    "CreatePRResult",
+    "GetPRRequest",
+    "GetPRResult",
+    "ListPRsRequest",
+    "ListPRsResult",
+    "MergePRRequest",
+    "MergePRResult",
+    "UpdatePRRequest",
+    "UpdatePRResult",
+    "GetWorkspaceRequest",
+    "GetWorkspaceResult",
+    "LockWorkspaceRequest",
+    "LockWorkspaceResult",
+    "UnlockWorkspaceRequest",
+    "UnlockWorkspaceResult",
+    "HealthStatus",
+    "ProviderStatus",
+]