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>

docs/test-actions.md

@@ -0,0 +1,119 @@
+# test-actions.sh
+
+Non-destructive smoke test for every readable action in the Unraid MCP server,
+executed via `mcporter call`.
+
+## Usage
+
+```bash
+# Against local server (default: http://localhost:6970/mcp)
+./scripts/test-actions.sh
+
+# Against a specific server
+./scripts/test-actions.sh http://10.1.0.2:6970/mcp
+
+# Via environment variable
+UNRAID_MCP_URL=http://10.1.0.2:6970/mcp ./scripts/test-actions.sh
+```
+
+Exit code is `0` when all executed tests pass, `1` if any fail.
+
+## Prerequisites
+
+- `mcporter` on `$PATH`
+- `python3` on `$PATH` (used for JSON result inspection and ID extraction)
+- Unraid MCP server reachable at the target URL
+
+Start the server if needed:
+
+```bash
+docker compose up -d          # production container
+uv run unraid-mcp-server      # local dev
+```
+
+## What It Tests
+
+The script runs in two sequential phases.
+
+### Phase 1 — Param-free reads
+
+All actions that require no arguments beyond `action` itself.
+
+| Tool | Actions tested |
+|---|---|
+| `unraid_info` | `overview`, `array`, `network`, `registration`, `connect`, `variables`, `metrics`, `services`, `display`, `config`, `online`, `owner`, `settings`, `server`, `servers`, `flash`, `ups_devices`, `ups_device`, `ups_config` |
+| `unraid_array` | `parity_status` |
+| `unraid_storage` | `disks`, `shares`, `unassigned`, `log_files` |
+| `unraid_docker` | `list`, `networks`, `port_conflicts`, `check_updates`, `sync_templates`, `refresh_digests` |
+| `unraid_vm` | `list` |
+| `unraid_notifications` | `overview`, `list`, `warnings`, `recalculate` |
+| `unraid_rclone` | `list_remotes`, `config_form` |
+| `unraid_users` | `me` |
+| `unraid_keys` | `list` |
+| `unraid_health` | `check`, `test_connection`, `diagnose` |
+
+### Phase 2 — ID-discovered reads
+
+The script extracts IDs from Phase 1 responses and uses them to test actions
+that require a specific resource identifier. Each is skipped if Phase 1 returned
+no matching resources.
+
+| Action | Source of ID |
+|---|---|
+| `docker: details` | first container from `docker: list` |
+| `docker: logs` | first container from `docker: list` |
+| `docker: network_details` | first network from `docker: networks` |
+| `storage: disk_details` | first disk from `storage: disks` |
+| `storage: logs` | first path from `storage: log_files` |
+| `vm: details` | first VM from `vm: list` |
+| `keys: get` | first key from `keys: list` |
+
+## What Is Skipped (and Why)
+
+Actions are skipped for one of three reasons shown in the output:
+
+| Label | Meaning |
+|---|---|
+| `destructive (confirm=True required)` | Action requires `confirm=True`; running it would permanently modify or delete data |
+| `mutation — state-changing` | Action modifies live system state (container lifecycle, VM state, settings) |
+| `mutation — creates …` | Action creates a new resource |
+
+### Full skip list
+
+**unraid_info**: `update_server`, `update_ssh`
+**unraid_array**: `parity_start`, `parity_pause`, `parity_resume`, `parity_cancel`
+**unraid_storage**: `flash_backup`
+**unraid_docker**: `start`, `stop`, `restart`, `pause`, `unpause`, `update`, `remove`, `update_all`, `create_folder`, `set_folder_children`, `delete_entries`, `move_to_folder`, `move_to_position`, `rename_folder`, `create_folder_with_items`, `update_view_prefs`, `reset_template_mappings`
+**unraid_vm**: `start`, `stop`, `pause`, `resume`, `reboot`, `force_stop`, `reset`
+**unraid_notifications**: `create`, `create_unique`, `archive`, `unread`, `archive_all`, `archive_many`, `unarchive_many`, `unarchive_all`, `delete`, `delete_archived`
+**unraid_rclone**: `create_remote`, `delete_remote`
+**unraid_keys**: `create`, `update`, `delete`
+**unraid_settings**: all 9 actions
+
+## Cleanup
+
+The script creates **no temporary files and no background processes**. There is
+nothing to clean up on exit or interrupt. Status lines and error details go to
+the terminal via stderr; captured JSON responses from `run_test_capture` live
+only in local shell variables and are discarded when the script exits.
+
+`set -euo pipefail` ensures the script exits immediately on unexpected errors.
+Arithmetic increments use `((var++)) || true` to safely handle the zero-to-one
+transition without triggering the pipefail exit.
+
+## Output Format
+
+```
+  <action label>                                              PASS
+  <action label>                                              FAIL
+      <first 3 lines of error>
+  <action label>                                              SKIP (reason)
+```
+
+Summary line at the end:
+
+```
+Results: 42 passed  0 failed  37 skipped  (79 total)
+```
+
+If any tests fail, the summary lists each failed label for quick triage.