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.

docs/research/unraid-api-exa-research.md

@@ -119,7 +119,7 @@ The API implements a **multi-layered security architecture** separating authenti
 Applications can request API access via a self-service flow ([source](https://docs.unraid.net/API/api-key-app-developer-authorization-flow/)):
 
 ```
-https://[unraid-server]/ApiKeyAuthorize?name=MyApp&&scopes=docker:read,vm:*&&redirect_uri=https://myapp.com/callback&&state=abc123
+https://[unraid-server]/ApiKeyAuthorize?name=MyApp&scopes=docker:read,vm:*&redirect_uri=https://myapp.com/callback&state=abc123
 ```
 
 **Scope Format:** `resource:action` pattern
@@ -302,7 +302,7 @@ The subscription system is event-driven: file changes on disk (detected by choki
 **jmagar/unraid-mcp** (this project) is the primary MCP server for Unraid ([source](https://glama.ai/mcp/servers/@jmagar/unraid-mcp), [source](https://mcpmarket.com/server/unraid)):
 
 - Python-based MCP server using FastMCP framework
-- 26 tools for comprehensive Unraid management
+- 10 tools with 90 actions for comprehensive Unraid management
 - Read-only access by default for safety
 - Listed on Glama, MCP Market, MCPServers.com, LangDB, UBOS, JuheAPI
 - 21 GitHub stars