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/tools/storage.py

@@ -4,7 +4,7 @@ Provides the `unraid_storage` tool with 6 actions for shares, physical disks,
 unassigned devices, log files, and log content retrieval.
 """
 
-import posixpath
+from pathlib import Path
 from typing import Any, Literal
 
 from fastmcp import FastMCP
@@ -102,8 +102,8 @@ def register_storage_tool(mcp: FastMCP) -> None:
         if action == "logs":
             if not log_path:
                 raise ToolError("log_path is required for 'logs' action")
-            # Normalize path to prevent traversal attacks (e.g. /var/log/../../etc/shadow)
-            normalized = posixpath.normpath(log_path)
+            # Resolve path to prevent traversal attacks (e.g. /var/log/../../etc/shadow)
+            normalized = str(Path(log_path).resolve())
             if not any(normalized.startswith(p) for p in _ALLOWED_LOG_PREFIXES):
                 raise ToolError(
                     f"log_path must start with one of: {', '.join(_ALLOWED_LOG_PREFIXES)}. "
@@ -143,8 +143,8 @@ def register_storage_tool(mcp: FastMCP) -> None:
                     "serial_number": raw.get("serialNum"),
                     "size_formatted": format_bytes(raw.get("size")),
                     "temperature": (
-                        f"{raw.get('temperature')}C"
-                        if raw.get("temperature")
+                        f"{raw['temperature']}\u00b0C"
+                        if raw.get("temperature") is not None
                         else "N/A"
                     ),
                 }
@@ -159,7 +159,7 @@ def register_storage_tool(mcp: FastMCP) -> None:
                 return {"log_files": list(files) if isinstance(files, list) else []}
 
             if action == "logs":
-                return dict(data.get("logFile", {}))
+                return dict(data.get("logFile") or {})
 
             raise ToolError(f"Unhandled action '{action}' — this is a bug")