v0.16.2

Released 2026-09-17. Every package in the workspace moves to 0.16.2 together.

• The basics, a two-part tutorial. A new page under Start here walks the first three moves
  against Postman Echo, slowly: one HTTP request, a JSON Schema gate on the answer, and a send
  built from the validated value, with a refusal and a transient retry in between, every
  command run for real and the UI shown along the way. The second half, the same three moves
  against DHIS2, is in the dirigent-dhis2 documentation. Both pages are also printed to a
  PDF that the published site carries.
• The installed set can no longer mix two releases. Every package requires its dirigent
  siblings at ==<version>, so uv tool upgrade dirigent-cli moves every package and a guard
  test fails the fast lane if a bump leaves one behind. 0.16.1's dg crashed on import when
  the tool was upgraded by name alone, because only the CLI moved.
• A watched run's queued step carries its own moment. dg run --watch against a server
  stamped every queued record with a year-1 sentinel that rendered as 0001-01-01 with a
  local-mean-time offset; the record now carries the attempt's created_at. The run listing
  and the dashboard's Needs a look also answer a failed run's error with what its failed
  step said, where the column was empty before.