Khalim Conn-Kowlessar d61a27e0ff Slice S0380.35: round gross-wall and party-wall areas in Decimal arithmetic per RdSAP10 §15 — closes cohort-2 cert 2800 / 4800 +0.0007 SAP residuals ... RdSAP10 §15 p.66 (Rounding of data): "All element areas (gross) including window areas and conservatory wall area: 2 d.p." Certs 2800 and 4800 lodge heat_loss_perimeter = 21.25 m and room_height = 2.30 m. The exact-decimal products 21.25 * 2.30 = 48.8750 (gross wall area) 6.25 * 2.30 = 14.3750 (party wall area) sit ON the HALF_UP rounding boundary and must round to 48.88 and 14.38 m^2. Float representation drops them BELOW the boundary: 21.25 (float) * 2.30 (float) ~= 48.87499... HALF_UP 2 d.p. = 48.87 6.25 (float) * 2.30 (float) ~= 14.37499... HALF_UP 2 d.p. = 14.37 The 0.01 m^2 area shortfall feeds into (29a) net wall area and (32) party wall area, and into (31) total external area for (36) thermal bridging — propagating a +0.0007 SAP residual via the U-weighted heat-loss sums. Adds `_decimal_round_half_up_sum` helper and routes both gross-wall and party-wall sums through it, mirroring the S0380.34 fix on `_living_area_fraction`. Certs that sit off the .005 boundary (i.e. nearly all) are unaffected; certs that land on it close from +0.0007 → <5e-5. Cohort-2 distribution after S0380.31..S0380.35: 38 exact (was 36 exact + 2 <=0.07). Cohort-1 ASHP cohort: 9/9 <1e-4 (unchanged). Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>		2026-05-28 16:07:38 +00:00
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addresses	get rid of comments	2026-05-20 13:21:11 +00:00
sap10_calculator	Slice S0380.35: round gross-wall and party-wall areas in Decimal arithmetic per RdSAP10 §15 — closes cohort-2 cert 2800 / 4800 +0.0007 SAP residuals	2026-05-28 16:07:38 +00:00
sap10_ml	Slice S0380.26: RdSAP10 §5.8 dry-lining adjustment on alt walls — closes cert 7700 -0.44 → +5e-5	2026-05-28 10:56:11 +00:00
tasks	added postcode splitter rewrite to ddd	2026-05-19 16:35:09 +00:00
postcode.py	get rid of comments	2026-05-20 13:21:11 +00:00