Bryan's correction: transcript source shouldn't be Plaud-specific. Google
Meet, Teams, or no transcript at all (fall back to notes/task registry)
are all real cases. Reworked Prerequisites and steps 3-5 so the skill asks
which source applies instead of defaulting to Plaud and treating an empty
result as 'no record exists.' Plaud-specific mechanics (official connector,
id resolution via list_files, of_ prefix, pagination) kept as documented
detail for when Plaud is the actual source, not as the only path.