Captures the full bottom-end-to-bottom-end validation of the Docker
stack on the deployment host: env file merge with the BYAN tooling,
FQDN switch from acadenice.fr to stark.a3n.fr (using the existing
wildcard DNS), and three corrective fixes that surfaced during
'make init' (explicit IPAM subnet for the saturated host, init: true
on the cron service for dcron PID 1, static healthz file outside the
src bind-mount).
Documents 4 reasoned decisions with alternatives, 5 anticipated jury
questions, 5 conscious points of improvement, and maps 6 RNCP 37805
criteria (1.e.4, 5.b, 7.a.1, 7.a.2, 7.b.3, 7.c.4).
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