Add Google Maps Timeline Import

Google Maps Timeline is a high-value owner data source, but the existing Google Takeout connector exposes location history only as one stream inside a broad archive connector. Current Google guidance also makes Timeline export a device/app file flow, so a browser scraper would be the wrong first implementation.

Google Maps Timeline has two relevant export paths:

The first-party Google Maps Timeline import connector SHALL collect from owner-provided export files rather than scraping Google Maps or using a Google account credential, SHALL require filesystem access and no network or browser binding, SHALL emit validated normalized Timeline records, and SHALL preserve source-format provenance on each emitted record. It SHALL NOT be advertised as an API-backed Google Maps connection.