estimateForJob: an INSTALLATION whose location matches a pre-wired site
(Lac des pins, Camping, Domaine Dauphinais) takes ¼ of the normal time
(infra already in place). Applied at the estimator source → flows into
est_min everywhere (greedy duration, VRP service_min, occupancy, travel).
Floored at 15 min; adds a "site pré-câblé ×¼" label. Verified: Lac des
pins install 120→30 min; normal install unchanged.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>