test: #46 increase coverage 32.6% → 45.4% (+129 tests)

Coverage by package:
- config:      49% → 87% (editor tests, hosts expansion, deploy_path)
- deploy:      34% → 61% (logs, provision, health check, audit, lock)
- initializer: 78% → 88% (PHP, Ruby, .NET edge cases, multi-module)
- pipeline:    38% → 48% (build hooks, package, dry-run)
- ssh:         19% → 31% (MockExecutor, dry-run, edge cases)
- logger:      95% (unchanged)
- module:      81% (unchanged)

SSH/pipeline remain below 60% because core methods require
real SSH connections. All testable pure logic is at 90%+.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: comchangs