The previous coercion treated "1"/"0" as booleans for parity with the
reserved `subscribed` column parser, but in custom columns those values
are far more often counts, quantities, or ids than true/false flags.
Coercing them to booleans hid the numeric segment-filter operators
(`gt`, `lt`) for fields that semantically are numbers, and miscategorised
them in `ContactService.getAvailableFields()` via `jsonb_typeof()`.
Drop "1"/"0" from the truthy/falsy keyword sets in `coerceCustomValue`.
With those entries gone the existing `NUMERIC_RE` branch picks both up
unchanged (the pattern already matches single-digit `0` and `1`), so
they land in `Contact.data` as JSON numbers. Boolean keyword coverage
remains for `true`/`false`/`yes`/`no` (case-insensitive, trimmed).
The reserved `subscribed` column parser at the top of the worker keeps
its own inline keyword set and continues to accept "1"/"0" — that
column is explicitly boolean by contract, so the asymmetry is
intentional.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
