[prakriya] Add extra dhatu support

vidyut-prakriya/data/extra-dhatu-cross-root.tsv

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+root	form	reason
+# Curated exclusions for the extra_dhatu_specs diagnostic. Each row is an
+# attested token that we would NOT expect vidyut to derive for the given root
+# because it is not a Pāṇinian form of *this* root: it belongs to a sibling
+# root, to a different gaṇa (a simple present cited under a Curādi-only
+# headword), or is an irregular stem (missing/extra guṇa/vṛddhi/nasal).
+#
+# Conservative by design: when vidyut's own output for the root looked empty,
+# mangled, or merely desibilated (a possible vidyut bug), the token was LEFT in
+# the denominator as a genuine gap rather than excluded here.
+#
+# Columns: root <TAB> form <TAB> reason
+band	badati	sibling-root (bad)
+BarB	Barbati	sibling-root (barb)
+beh	vehati	sibling-root (veh)
+Bfkz	Brakzati	sibling-root (bhrakṣ)
+bfMh	barhayati	sibling-root (barh)
+Brajj	Barjayati	sibling-root (bharj)
+BrAs	bABrASyate	sibling-root (bhraṃś, ś-stem intensive)
+BrAs	biBrASizate	sibling-root (bhraṃś, ś-stem desiderative)
+BrAs	BrASayati	sibling-root (bhraṃś, ś-stem ṇic)
+BraS	BrASayati	sibling-root (bhrāś)
+cIb	cIvayati	sibling-root (cīv)
+cuRq	cuwati	sibling-root (cuṭ)
+cuRq	cowayati	sibling-root (cuṭ ṇic)
+cuRw	cuwati	sibling-root (cuṭ)
+cuRw	cowayati	sibling-root (cuṭ ṇic)
+cuRW	Wayati	fragment / sibling
+Dam	DmApayati	sibling-root (dhmā ṇic)
+Dam	DmAyate	sibling-root (dhmā passive)
+DfYj	Darjati	sibling-root (darj)
+DrAj	DfYjati	sibling-root (dhṛñj)
+DrAj	Drajati	sibling-root (dhraj)
+DrAj	DraYjati	sibling-root (dhrañj)
+DraYj	DfYjati	sibling-root (dhṛñj)
+DraYj	Drajati	sibling-root (dhraj)
+DvaYj	Dvajati	sibling-root (dhvaj)
+gfYj	garjati	sibling-root (garj)
+hrUq	hroqati	sibling-root (hruḍ, short-u guṇa)
+hruq	hrUqati	sibling-root (hrūḍ, long-ū)
+jamB	jaBate	sibling-root (jabh, de-nasal)
+jamB	jaYjaByate	sibling-root (jabh, de-nasal intensive)
+KuRq	Koqayati	sibling-root (khoḍ/khuḍ)
+KuRq	kzodayati	sibling-root (kṣud)
+kland	kladate	sibling-root (klad, de-nasal)
+marj	mfYjati	sibling-root (mṛj)
+naMS	naSati	sibling-root (naś)
+naNK	naKati	sibling-root (nakh)
+naNK	naKyati	sibling-root (nakh, cl.4)
+sajj	saYjati	sibling-root (sañj)
+saYj	sajjati	sibling-root (sajj)
+sfB	sarBati	sibling-root (sarbh)
+sfmB	sarBati	sibling-root (sarbh)
+SraNg	SvaNgati	sibling-root (śvaṅg)
+SraNk	SvaNkate	sibling-root (śvaṅk)
+sriB	sreBati	sibling-root (sribh, guṇa)
+srimB	sreBati	sibling-root (sribh, guṇa)
+svaNg	SvaNgati	sibling-root (śvaṅg)
+svaNk	SvaNkate	sibling-root (śvaṅk)
+Svaj	Svajate	sibling-root (śvaj, de-nasal)
+SvaYj	Svajate	sibling-root (śvaj, de-nasal)
+svaYj	svajate	sibling-root (svaj, de-nasal)
+svad	svAdati	sibling-root (svād)
+low	loqati	sibling-root (loḍ)
+rOw	rOqati	sibling-root (rauḍ)
+sil	Silati	sibling-root (śil)
+stam	samayati	sibling-root (śam)
+vuNg	buNgati	sibling-root (buṅg)
+mind	medayati	sibling-root (med)
+muYj	mojayati	sibling-root (moj)
+maNk	mamaNgire	sibling-root (maṅg perfect)
+maNk	SuSuBire	sibling-root (śubh perfect)
+taMs	tantasyati	sibling-root (tas, intensive)
+lpI	lyinAti	sibling-root (lyī)
+lyI	lpinAti	sibling-root (lpī)
+BfMS	BfMSati	cross-gaṇa (simple present under Curādi headword)
+BaRq	BaRqati	cross-gaṇa (simple present under Curādi headword)
+kaRq	kaRqati	cross-gaṇa (simple present under Curādi headword)
+kumb	kumbati	cross-gaṇa (simple present under Curādi headword)
+kuMs	kuMsati	cross-gaṇa (simple present under Curādi headword)
+mfc	mfcyati	cross-gaṇa (simple present under Curādi headword)
+naNK	naNKati	cross-gaṇa (simple present under Curādi headword)
+olaRq	olaRqati	cross-gaṇa (simple present under Curādi headword)
+olaRq	olaRqayati	cross-gaṇa (Curādi ṇic variant)
+panT	panTati	cross-gaṇa (simple present under Curādi headword)
+paRq	paRqati	cross-gaṇa (simple present under Curādi headword)
+paMS	paMSati	cross-gaṇa (simple present under Curādi headword)
+raMh	raMhati	cross-gaṇa (simple present under Curādi headword)
+raMh	raMhate	cross-gaṇa (simple present under Curādi headword)
+ruMS	ruMSati	cross-gaṇa (simple present under Curādi headword)
+stUp	stUpyati	cross-gaṇa (simple present under Curādi headword)
+vrUs	vrUsati	cross-gaṇa (simple present under Curādi headword)
+druq	droqati	cross-gaṇa (Bhvādi present under Curādi headword)
+kuMs	kuMSati	sibling-root (kuṃś, s↔ś)
+kuMS	kuMsati	sibling-root (kuṃs, ś↔s)
+druq	druqati	irregular stem (Bhvādi present requires guṇa → droqati)
+gah	gahayati	irregular ṇic (gāh → gāhayati, vṛddhi)
+gUrd	gurdayati	irregular stem (root gūrd, long ū)
+iNK	INKayati	irregular stem (root iṅkh, short i)
+sTir	sTirati	irregular stem (requires guṇa → sterati)
+sTag	sTagayati	irregular ṇic (sthāg → sthāgayati)
+DIkz	Dikzate	irregular stem (root dīkṣ, long ī)
+SvaRW	SvAWayati	irregular stem (loses ṇ; root śvaṇṭh)
+aMS	aMSApayati	irregular ṇic (-Āpaya on a consonant-final root)
+stam	stamayati	irregular ṇic (stam → stāmayati)