Cambium 0.3.6

Pairing fix. Cambium could not pair with a signer that answers connect by echoing the bunker URI's secret, which is what current NIP-46 specifies and what Heartwood's firmware does.

• The rust-nostr dependency moves from 0.44.2 to 0.44.8. The older build accepted only the literal ack as a connect result and refused the secret echo, so pairing ended in "Unexpected response" against a spec-following signer. Both forms are accepted now, so signers on either convention pair. Verified against live hardware and against nak bunker, which still answers ack.

Verify before installing (AppVerifier):

dev.forgesworn.cambium
9E:A1:88:EF:A9:01:5F:7E:7F:90:E1:88:8F:58:6F:52:7B:2A:0E:8A:6D:CD:B3:99:1E:41:FB:4F:14:EE:EF:C6

SHA-256 of cambium-0.3.6.apk: c2bc236d108773c823790b60003541dc77f4d4383ebd6f211f5242f8998d5b52