MCP server: add tools for IPAM records (networks, IP addresses, VLANs, VLAN zones)

Add MCP tools for IPAM that follow the same pattern as the existing asset and article tools:

• Networks: list (with company, parent network, and archived filters), show, create, edit

• IP addresses: list (filter by network, company, status, address, or FQDN), show, create, edit

• VLANs and VLAN zones: list, show, create, edit

• Delete or archive for each record type, gated behind the same destructive-action permissions the API uses today