Fix AuthConfig AttributeError and tool discovery tag parsing

[AutomateIP]

Summary: Fix Configuration Access and Tool Discovery

This PR addresses several critical issues identified during server initialization and tool discovery, primarily stemming from the migration to a structured dataclass-based configuration system.

Key Fixes:

1. Configuration Compatibility for Authentication

• File: src/itential_mcp/server/auth.py
• Issue: The authentication provider builder was attempting to call .get() on an AuthConfig dataclass, resulting in an AttributeError.
• Fix: Utilized the auth_to_dict converter to transform the dataclass into a dictionary before processing, maintaining compatibility with existing provider logic.

2. Corrected Middleware Configuration Access

• File: src/itential_mcp/middleware/serialization.py
• Issue: An invalid attribute path cfg.server_response_format was used, which caused an AttributeError during middleware initialization.
• Fix: Updated the access path to the correct structured location: cfg.server.response_format.

3. Robust Tool Discovery for Fully Qualified Modules

• File: src/itential_mcp/utilities/tool.py
• Issue: The tool discovery mechanism was strictly comparing module names, which failed when tools were imported via their fully qualified package names (e.g., itential_mcp.tools.adapters vs adapters).
• Fix: Enhanced the module name check to accept both simple and fully qualified module names, ensuring all static tools are correctly registered.

4. Support for Comma-Separated Tag Filtering

• File: src/itential_mcp/server/server.py
• Issue: Comma-separated strings for include_tags and exclude_tags (from config/env) were passed directly to FastMCP, which expects a list. This often resulted in all tools being filtered out.
• Fix: Added a helper to parse comma-separated tag strings into lists before initializing the FastMCP server.

Impact:

These changes ensure the MCP server can start successfully with authentication enabled and correctly populates the available tools list in clients like Claude Desktop.

[AutomateIP]

@privateip Karan reported an issue opening itential-mcp on Claude Desktop. This is an attempt to address it. The fix is a bit involved.

Please review carefully.

[privateip]

@AutomateIP can you rebase this PR against the latest please

[AutomateIP]

@AutomateIP can you rebase this PR against the latest please

done