v0.5.0 — CNC pivot release

Merge pull request #1 from jmeltz/feature/enrichment-compliance-overhaul

Add vulnerability enrichment, compliance mappings, and OPC UA scanner

Add GE-SRTP scanner for Emerson/GE PLCs and rebrand vendor as Emerson…

… / GE

Implements SRTP (Service Request Transport Protocol) on TCP 18245 with INIT
handshake and Controller Type Read (service 0x43) to identify PACSystems RX3i,
RX7i, RSTi-EP, Series 90, and VersaMax PLCs. Merges GE and Emerson vendor
aliases into unified "Emerson / GE" canonical name for advisory matching.
Auto mode now runs all seven protocols concurrently.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>