autoswitch-bluetooth-profile: defer profile change until routes are ready #16
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Summary
Background
During Bluetooth profile transitions,
GNOME’s libgnome-volume-control can crash if it receives port notifications before ports are populated.
WirePlumber may switch profiles before EnumRoute is ready, leading to transient portless streams.
Fix
Check for EnumRoute availability before switching/restoring profiles.
If not ready, defer with bounded retries.
Reset retry state on successful switch/restore.
Cross‑reference
Companion defensive fix in libgnome-volume-control PR:
GNOME/libgnome-volume-control#1
This avoids asserting on NULL ports during transient states.
Test plan
meson setup build && ninja -C build