Remove unused MCP resources and update documentation

- Remove array_status, system_info, notifications_overview, and parity_status resources
- Keep only logs_stream resource (unraid://logs/stream) which is working properly
- Update README.md with current resource documentation and modern docker compose syntax
- Fix import path issues that were causing subscription errors
- Update environment configuration examples
- Clean up subscription manager to only include working log streaming

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

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

unraid_mcp/core/client.py

@@ -0,0 +1,147 @@
+"""GraphQL client for Unraid API communication.
+
+This module provides the HTTP client interface for making GraphQL requests
+to the Unraid API with proper timeout handling and error management.
+"""
+
+import json
+from typing import Any
+
+import httpx
+
+from ..config.logging import logger
+from ..config.settings import TIMEOUT_CONFIG, UNRAID_API_KEY, UNRAID_API_URL, UNRAID_VERIFY_SSL
+from ..core.exceptions import ToolError
+
+# HTTP timeout configuration
+DEFAULT_TIMEOUT = httpx.Timeout(10.0, read=30.0, connect=5.0)
+DISK_TIMEOUT = httpx.Timeout(10.0, read=TIMEOUT_CONFIG['disk_operations'], connect=5.0)
+
+
+def is_idempotent_error(error_message: str, operation: str) -> bool:
+    """Check if a GraphQL error represents an idempotent operation that should be treated as success.
+
+    Args:
+        error_message: The error message from GraphQL API
+        operation: The operation being performed (e.g., 'start', 'stop')
+
+    Returns:
+        True if this is an idempotent error that should be treated as success
+    """
+    error_lower = error_message.lower()
+
+    # Docker container operation patterns
+    if operation == 'start':
+        return (
+            'already started' in error_lower or
+            'container already running' in error_lower or
+            'http code 304' in error_lower
+        )
+    elif operation == 'stop':
+        return (
+            'already stopped' in error_lower or
+            'container already stopped' in error_lower or
+            'container not running' in error_lower or
+            'http code 304' in error_lower
+        )
+
+    return False
+
+
+async def make_graphql_request(
+    query: str,
+    variables: dict[str, Any] | None = None,
+    custom_timeout: httpx.Timeout | None = None,
+    operation_context: dict[str, str] | None = None
+) -> dict[str, Any]:
+    """Make GraphQL requests to the Unraid API.
+
+    Args:
+        query: GraphQL query string
+        variables: Optional query variables
+        custom_timeout: Optional custom timeout configuration
+        operation_context: Optional context for operation-specific error handling
+                          Should contain 'operation' key (e.g., 'start', 'stop')
+
+    Returns:
+        Dict containing the GraphQL response data
+
+    Raises:
+        ToolError: For HTTP errors, network errors, or non-idempotent GraphQL errors
+    """
+    if not UNRAID_API_URL:
+        raise ToolError("UNRAID_API_URL not configured")
+
+    if not UNRAID_API_KEY:
+        raise ToolError("UNRAID_API_KEY not configured")
+
+    headers = {
+        "Content-Type": "application/json",
+        "X-API-Key": UNRAID_API_KEY,
+        "User-Agent": "UnraidMCPServer/0.1.0"  # Custom user-agent
+    }
+
+    payload = {"query": query}
+    if variables:
+        payload["variables"] = variables
+
+    logger.debug(f"Making GraphQL request to {UNRAID_API_URL}:")
+    logger.debug(f"Query: {query[:200]}{'...' if len(query) > 200 else ''}")  # Log truncated query
+    if variables:
+        logger.debug(f"Variables: {variables}")
+
+    current_timeout = custom_timeout if custom_timeout is not None else DEFAULT_TIMEOUT
+
+    try:
+        async with httpx.AsyncClient(timeout=current_timeout, verify=UNRAID_VERIFY_SSL) as client:
+            response = await client.post(UNRAID_API_URL, json=payload, headers=headers)
+            response.raise_for_status()  # Raise an exception for HTTP error codes 4xx/5xx
+
+            response_data = response.json()
+            if "errors" in response_data and response_data["errors"]:
+                error_details = "; ".join([err.get("message", str(err)) for err in response_data["errors"]])
+
+                # Check if this is an idempotent error that should be treated as success
+                if operation_context and operation_context.get('operation'):
+                    operation = operation_context['operation']
+                    if is_idempotent_error(error_details, operation):
+                        logger.warning(f"Idempotent operation '{operation}' - treating as success: {error_details}")
+                        # Return a success response with the current state information
+                        return {
+                            "idempotent_success": True,
+                            "operation": operation,
+                            "message": error_details,
+                            "original_errors": response_data["errors"]
+                        }
+
+                logger.error(f"GraphQL API returned errors: {response_data['errors']}")
+                # Use ToolError for GraphQL errors to provide better feedback to LLM
+                raise ToolError(f"GraphQL API error: {error_details}")
+
+            logger.debug("GraphQL request successful.")
+            return response_data.get("data", {})  # Return only the data part
+
+    except httpx.HTTPStatusError as e:
+        logger.error(f"HTTP error occurred: {e.response.status_code} - {e.response.text}")
+        raise ToolError(f"HTTP error {e.response.status_code}: {e.response.text}")
+    except httpx.RequestError as e:
+        logger.error(f"Request error occurred: {e}")
+        raise ToolError(f"Network connection error: {str(e)}")
+    except json.JSONDecodeError as e:
+        logger.error(f"Failed to decode JSON response: {e}")
+        raise ToolError(f"Invalid JSON response from Unraid API: {str(e)}")
+
+
+def get_timeout_for_operation(operation_type: str = "default") -> httpx.Timeout:
+    """Get appropriate timeout configuration for different operation types.
+
+    Args:
+        operation_type: Type of operation ('default', 'disk_operations')
+
+    Returns:
+        httpx.Timeout configuration appropriate for the operation
+    """
+    if operation_type == "disk_operations":
+        return DISK_TIMEOUT
+    else:
+        return DEFAULT_TIMEOUT