fix: FEDERAL_DEFLECTION could not see the participial state-subject form

[skishchampi]

Delivers REQ-0072, filed by zero-hour today.

The defect

_FEDERAL_DEFLECTION's state-subject pattern required a copula:

\b(?:is|are)\s+(?:a|an)\s+[Ss]tate\s+[Ss]ubject\b

Indian legislative English drops it:

"Agriculture being a State subject, there is no investment in agriculture directly by the Central Government in the States."
— LS|S|734|2000-05-17, Minister of Agriculture

Reproduced before the change: that sentence returned UNCLASSIFIED at 0.0. The copula form returned FEDERAL_DEFLECTION at 0.92.

The change

One alternation. (?:is|are) becomes (?:is|are|being).

Measured by zero-hour over 489,469 answered records

measure	n
answers mentioning "State subject"	34,632
matching the shipped copula pattern	5,542
using "being a State subject"	3,080
of those, also matching the copula	98
using the participle, invisible to the pattern	2,982
of those, carrying no label from ANY tier	518

This moves a published number, and I checked which way

I diffed the classifier before and after, in two processes, over a spread of constructed cases. Acceptance 3 needs a caveat the request did not have.

Pure recall — the 518. UNCLASSIFIED → FEDERAL_DEFLECTION. Raises the evasive count and the classified denominator.

Not pure recall — the other 2,464. These already carry a label from another pattern, and FEDERAL_DEFLECTION's 0.92 outranks it. Verified examples:

before	after	effect
ABSORBED (evasive)	FEDERAL_DEFLECTION	distribution only
ACCEPTED (substantive)	FEDERAL_DEFLECTION	rate rises
REJECTED (substantive)	FEDERAL_DEFLECTION	rate rises

That precedence is pre-existing and is not introduced here. I confirmed against the unmodified code that the copula form already outranks ACCEPTED and REJECTED at 0.92. This change makes the participle behave exactly as the copula does — which is what the request asks for.

A separate question falls out of it, and it belongs upstream of this PR: should a state-subject clause outrank a substantive disclosure at all? "Agriculture is a State subject, Government has approved Rs 500 crore and released the funds" reads FEDERAL_DEFLECTION today. That is the shipped copula pattern's behaviour, not this alternation's.

Acceptance

1. ✅ classify_response("Agriculture being a State subject, ...", "qa") returns FEDERAL_DEFLECTION.
2. ✅ Regression test carries the verbatim sentence and its source key.
3. ⚠️ No label the copula pattern already matched changes — met, and tested. But labels other patterns matched do move. Documented above and in the changelog.
4. ✅ The changelog leads with the fact that it moves a published number, and names analyse-discourse as the re-run.

Tests

509 passed, 1 skipped, 12 subtests. Three new tests: the verbatim sentence, a guard that participle and copula agree on label and confidence, and a check that copula matches do not move.

[chatgpt-codex-connector]

You have reached your Codex usage limits for code reviews. You can see your limits in the Codex usage dashboard.
To continue using code reviews, you can upgrade your account or add credits to your account and enable them for code reviews in your settings.