feat: coordinate modeled two-carrier cargo handover

README.mdmodified+4-2

Changes to README.md

		⋯124 linesShow the 124 lines above this hunk@@ -125,8 +125,10 @@ and exits 1. Its capability flags remain separate from the modeled delivery miss
125	125	The [cargo delivery guide](docs/cargo-delivery.md) covers explicit mass/CG, receiver, alternate
126	126	and power declarations, captured release/custody, redundant links and post-release failures.
127	127	Exit 2 retains a configured mission that did not complete a matched delivery and carrier landing.
128		-Distinct-vehicle fleet handover, electrical/measured endurance and physical/operational
129		-qualification remain open in [#25](https://github.com/stacksjs/drone/issues/25).
	128	+The [two-carrier model](docs/cargo-fleet.md) and `./buddy cargo:fleet` now execute actual
	129	+finite station handover and the receiver's second delivery under separate sensor/authority
	130	+scopes. Six bounded cases retain radio/host loss and uncertain receipt. General fleet
	131	+fault/recovery, electrical/measured endurance and physical/operational qualification remain open in [#25](https://github.com/stacksjs/drone/issues/25).
130	132
131	133	## Agriculture sensing
132	134