Facebook Reels: the requests

The reels domain of Facebook's client (rule 48, rule 49): the requests a Reels session makes, one doc each, built by log facebook capture --docs from the runs' recordings, with rea's reading of each request's code.

Recorded by the warm-up's reel activity: log facebook warmup reel --account <a> (the account's browser primed with it, each step checked, the outline in the run's warmup_facebook_reel.json). The first recording: run 20261020T050610 on Bethlehem. The request names it records set the domain's pattern (src/rea/facebookClient/helpers/domainOf.ts), which is a first guess (Reel in the name) until then.