feat(netbox)!: gut server from 182 to 37 tools

BREAKING CHANGE: Removed circuits, tenancy, VPN, wireless modules entirely.
Stripped DCIM, IPAM, virtualization, extras to only essential tools.
Deleted NETBOX_ENABLED_MODULES filtering — no longer needed.

- Delete circuits.py, tenancy.py, vpn.py, wireless.py
- Strip dcim.py to sites, devices, interfaces only (11 tools)
- Strip ipam.py to IPs, prefixes, services only (10 tools)
- Strip virtualization.py to clusters, VMs, VM interfaces only (10 tools)
- Strip extras.py to tags, journal entries only (6 tools)
- Remove all module filtering code from config.py and server.py
- Rewrite README.md with accurate 37-tool documentation
- Update CHANGELOG.md with breaking change entry
- Token reduction: ~19,810 → ~3,700 (~81%)

Remaining work: Update cmdb-assistant plugin skills (10 files) in follow-up PR

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

mcp-servers/netbox/mcp_server/tools/__init__.py

@@ -1,20 +1,12 @@
 """NetBox MCP tools package."""
 from .dcim import DCIMTools
 from .ipam import IPAMTools
-from .circuits import CircuitsTools
 from .virtualization import VirtualizationTools
-from .tenancy import TenancyTools
-from .vpn import VPNTools
-from .wireless import WirelessTools
 from .extras import ExtrasTools
 
 __all__ = [
     'DCIMTools',
     'IPAMTools',
-    'CircuitsTools',
     'VirtualizationTools',
-    'TenancyTools',
-    'VPNTools',
-    'WirelessTools',
     'ExtrasTools',
 ]