Add URL scheme validation before HTTP requests that transmit sensitive
data (account IDs, phone numbers, user IDs). All endpoints already use
HTTPS URLs, but this explicit check satisfies CodeQL rust/cleartext-
transmission analysis and prevents future regressions if URLs are
changed.
Affected files: composio.rs, whatsapp.rs, qq.rs
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>