Prevent runspace races during analyzer command metadata access

[Copilot]

The semver benchmark intermittently failed to resolve Export-ModuleMember -Function. Command metadata reads could re-enter the shared PowerShell runspace outside the lookup lock, causing parameter-resolution failures and session-state collection corruption.

• Export resolution: Resolve parameter names, aliases, and abbreviations from static metadata instead of runspace-dependent ResolveParameter().
• Metadata synchronization: Protect parameter and parameter-set reads with the command lookup lock; route affected rules through synchronized helpers. Resolve lazy cache entries before acquiring the lock to avoid deadlocks.
• Integration: Retain the complementary Get-Command hardening merged into main. Leave the benchmark workflow and measurement script unchanged.