feat(10-03): enrich registry.ts with tooltipText and helpText for credential fields
- S3: access_key_id and secret_access_key get helpText + tooltipText (IAM console guidance)
- S3: region gets tooltipText (where to find in S3 console)
- S3-compatible: access_key_id, secret_access_key get helpText + tooltipText (provider-specific)
- S3-compatible: endpoint gets tooltipText (common endpoint examples for Wasabi, R2, MinIO)
- GCS: project_number gets tooltipText (numeric ID vs text project ID)
- GCS: service_account_credentials gets tooltipText (IAM console steps + doc link)
- B2: account and key get tooltipText (App Keys page, shown-once warning)
- OneDrive: drive_id gets tooltipText (rclone authorize output, b! prefix)
- SFTP host and user intentionally unchanged (self-explanatory per user decision)
- Azure Blob, OneDrive token, SFTP pass/key_pem existing text untouched
kawa
356d557348