refactor: Extract modular subpackage from napseer_mcp_server.py
Split 810+ lines into organized modules:
- napseer/constants.py: Discovery, lifecycle, kanban, planning constants
- napseer/crypto.py: ChaCha20-Poly1305, AES-256-GCM, key derivation
- napseer/gateway.py: Gateway management, relay, terminal helpers
- napseer/telemetry.py: Event logging, metrics
Main file imports from modular package when available, with graceful
fallback to inline definitions for backward compatibility.
Tests: 36/36 passing
HumbleTurtle
9ea082c919