Request flow: dropbet sign-in (moved)

This page was a near-duplicate of ../flows/dropbet-sign-in.md.

Both anchored on traces 456b4797b61fd23db1baf685bbdcf378 (ebit-api side) and d4342af7440f0d3beff8f3e5e46a6336 (browser + api). The flow doc carries the canonical narrative with sequence diagram, span timings, and the cookie/JWT/2FA contract.

→ Go to ../flows/dropbet-sign-in.md.

For auth lifecycle abstracted from the trace, see ../api-reference/auth-flow.md.