docs: add non-destructive action smoke test script

Adds scripts/test-actions.sh — a mcporter-based smoke test that exercises
all 42 non-destructive MCP actions across 10 tools. Two-phase design:
phase 1 runs param-free reads; phase 2 extracts resource IDs from those
responses to test the ID-required reads (container details/logs, network
details, disk details, log content, VM details, API key get).

Also adds docs/test-actions.md with full usage, coverage table, skip
rationale, and cleanup notes.

Fixed three bugs discovered during test run:
- Connectivity check used curl -f which treats 406 (correct MCP response
  to plain GET) as failure
- run_test_capture wrote status lines to stdout causing captured $() to
  contain mixed text+JSON, breaking all Phase 2 ID extraction
- run_test echoed full JSON response to terminal on every call

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

pyproject.toml

@@ -10,7 +10,7 @@ build-backend = "hatchling.build"
 # ============================================================================
 [project]
 name = "unraid-mcp"
-version = "0.4.2"
+version = "0.4.3"
 description = "MCP Server for Unraid API - provides tools to interact with an Unraid server's GraphQL API"
 readme = "README.md"
 license = {file = "LICENSE"}