fix: address 54 MEDIUM/LOW priority PR review issues

Comprehensive fixes across Python code, shell scripts, and documentation
addressing all remaining MEDIUM and LOW priority review comments.

Python Code Fixes (27 fixes):
- tools/info.py: Simplified dispatch with lookup tables, defensive guards,
  CPU fallback formatting, !s conversion flags, module-level sync assertion
- tools/docker.py: Case-insensitive container ID regex, keyword-only confirm,
  module-level ALL_ACTIONS constant
- tools/virtualization.py: Normalized single-VM dict responses, unified
  list/details queries
- core/client.py: Fixed HTTP client singleton race condition, compound key
  substring matching for sensitive data redaction
- subscriptions/: Extracted SSL context creation to shared helper in utils.py,
  replaced deprecated ssl._create_unverified_context API
- tools/array.py: Renamed parity_history to parity_status, hoisted ALL_ACTIONS
- tools/storage.py: Fixed dict(None) risks, temperature 0 falsiness bug
- tools/notifications.py, keys.py, rclone.py: Fixed dict(None) TypeError risks
- tests/: Fixed generator type annotations, added coverage for compound keys

Shell Script Fixes (13 fixes):
- dashboard.sh: Dynamic server discovery, conditional debug output, null-safe
  jq, notification count guard order, removed unused variables
- unraid-query.sh: Proper JSON escaping via jq, --ignore-errors and --insecure
  CLI flags, TLS verification now on by default
- validate-marketplace.sh: Removed unused YELLOW variable, defensive jq,
  simplified repository URL output

Documentation Fixes (24+ fixes):
- Version consistency: Updated all references to v0.2.0 across pyproject.toml,
  plugin.json, marketplace.json, MARKETPLACE.md, __init__.py, README files
- Tool count updates: Changed all "26 tools" references to "10 tools, 90 actions"
- Markdown lint: Fixed MD022, MD031, MD047 issues across multiple files
- Research docs: Fixed auth headers, removed web artifacts, corrected stale info
- Skills docs: Fixed query examples, endpoint counts, env var references

All 227 tests pass, ruff and ty checks clean.

unraid_mcp/subscriptions/utils.py

@@ -0,0 +1,27 @@
+"""Shared utilities for the subscription system."""
+
+import ssl as _ssl
+
+from ..config.settings import UNRAID_VERIFY_SSL
+
+
+def build_ws_ssl_context(ws_url: str) -> _ssl.SSLContext | None:
+    """Build an SSL context for WebSocket connections when using wss://.
+
+    Args:
+        ws_url: The WebSocket URL to connect to.
+
+    Returns:
+        An SSLContext configured per UNRAID_VERIFY_SSL, or None for non-TLS URLs.
+    """
+    if not ws_url.startswith("wss://"):
+        return None
+    if isinstance(UNRAID_VERIFY_SSL, str):
+        return _ssl.create_default_context(cafile=UNRAID_VERIFY_SSL)
+    if UNRAID_VERIFY_SSL:
+        return _ssl.create_default_context()
+    # Explicitly disable verification (equivalent to verify=False)
+    ctx = _ssl.SSLContext(_ssl.PROTOCOL_TLS_CLIENT)
+    ctx.check_hostname = False
+    ctx.verify_mode = _ssl.CERT_NONE
+    return ctx