fix(helper): coexist on dyld inserts, re-arm sims#19
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A single launchctl setenv overwrote any DYLD_INSERT_LIBRARIES a peer tool (SimEnclave) had set, and arming ran only at bridge start. Compose append-if-absent, remove only our own entry on teardown, and re-arm booted simulators on a short cadence, so the two tools coexist and a boot, reboot, or clobber recovers without a manual toggle.
Teardown matched our dyld entry by absolute path, so a moved or missing slice stranded a stale insert. Match by file name instead; compose dedupes by name too.
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Coexistence and teardown verified; full suite green.
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SimBLE and a peer simulator-injection tool (SimEnclave) both set DYLD_INSERT_LIBRARIES; a single launchctl setenv overwrote the other, and arming ran only at bridge start.
The SimBLE half of the coexistence fix shipped in SimEnclave v1.1.1. Fence allowlist updated for the new file; the helper suite (including end-to-end arming with a fake runner) passes.