v0.4.40 fixed the WRITER: a boolean sent through the pod env builder's
int loop was dropped, because `False == 0`. The reader had the same bug
in mirror image. The env row was declared with `bool` as its cast:

    ("CODERAI_OCR_EARLY_LOOP_ABORT", "early_loop_abort", bool)

and the typed loop does `_cast(_val)` -- so `bool("0")` is True, and a
pod sent `CODERAI_OCR_EARLY_LOOP_ABORT=0` turned the feature ON.

One flag, two opposite coercions, both wrong in the same direction: it
could only ever be enabled. Caught by the A/B test it was blocking --
the "abort off" run reported 8 aborts.

Booleans belong in the `_flag()` loop, which reads the STRING ("1",
"true", "yes", "on" and nothing else), because that is the only way an
environment variable can express false. Moved there, with a guard that
no CODERAI_* env row anywhere casts with `bool`.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KnfkxBpcZ1v6ypRFFyhrVM