feat: promote linux native audio path

poc/tsidentity-import-spike/VERIFICATION.md

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+# Verification record — `tsidentity-import-spike`
+
+## Result
+
+PASS. The sample TeamSpeak identity file imported successfully, exported back to
+the exact same identity string, and was usable for a live connection to
+`kr.teamspeak.app`.
+
+## Environment
+
+| Field | Value |
+|---|---|
+| Date | 2026-05-25 |
+| Host OS | Linux (x86_64) |
+| Build profile | test + dev |
+| Target server | `kr.teamspeak.app` |
+
+## Commands
+
+```bash
+cargo test --offline
+
+cargo run --offline -- \
+  --identity-file /path/to/exported_identity.ini \
+  --address kr.teamspeak.app
+```
+
+## What was observed
+
+- Unit test passed:
+  - exported identity INI parsed successfully
+  - exported identity string matched the original exactly
+- Imported sample identity properties:
+  - nickname: `Edison.Jwa`
+  - UID: `eaRkG62hRaLs+R9sOuOWK7xbnUY=`
+  - security level: `8`
+  - counter: `40`
+- Live connect using the imported identity succeeded:
+  - connected nickname: `Edison.Jwa`
+  - connected UID: `eaRkG62hRaLs+R9sOuOWK7xbnUY=`
+  - connected DBID: `17225`
+  - connected CLID: `18506`
+  - connected CID: `1`
+  - country: `KR`
+  - server groups: `{ServerGroupId(8)}`
+
+## Important finding
+
+The provided sample identity is **not** the live `EdisonJwa` identity currently
+online on `kr.teamspeak.app`.
+
+- Sample imported identity UID: `eaRkG62hRaLs+R9sOuOWK7xbnUY=`
+- Live `EdisonJwa` UID from the query spike: `QcnldW6Qnw/4im/t94j/FYIcVMU=`
+
+That means:
+
+- the import/export implementation is working, and
+- the sample INI belongs to a different TeamSpeak identity than the live
+  `EdisonJwa` account used in the example profile.