🎨 Palette: Add context-aware tooltips to VS Code extension status bar

[raccioly]

💡 What: Added context-aware tooltips to the VS Code extension status bar for "unknown" and "error" states during score refresh, and fixed an async syntax error on the top-level activate function.
🎯 Why: When developers encounter a ? CDD score in the status bar, a generic tooltip ("Click to see CDD score details") doesn't explain what went wrong. Providing informative tooltips clarifies whether the output couldn't be parsed or if an execution error occurred, enhancing the CLI-to-editor feedback loop.
📸 Before/After: N/A (Tooltips now explicitly mention parse errors or execution errors instead of default text).
♿ Accessibility: Improved cognitive accessibility by providing clear, context-dependent textual feedback rather than relying on ambiguous visual cues (?).

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PR created automatically by Jules for task 5760976148415975845 started by @raccioly

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