feat(init): supervise servers+session progs: restart on death, same endpoint, backoff 0/1/5/30s then give up, restarts_clients cascade; release grants/spawn at stop (stale-slot safe); storage death fatal; init output via printer thread (never blocks on log); terminal Ctrl+C via CONTROL-badged copy, latest wins; flaky test server + spawntest restart/backoff check

Makefile

@@ -54,7 +54,7 @@ kani: kani-types kani-domain kani-kernel
 PROGRAMS = -p init -p echo -p sleep -p snake \
 	-p display-qemu -p input-qemu -p storage-qemu \
 	-p log-server -p permission-manager -p session-server -p smptest -p spawntest -p hello \
-	-p terminal-server -p shell -p cat -p ls -p counter -p gatekeeper
+	-p terminal-server -p shell -p cat -p ls -p counter -p gatekeeper -p flaky
 
 # Programs first: the kernel image packs init and storage (see the
 # adapter's build.rs).