add mic recording, rename scripts, extend camera dump

- Rename main.py → play_speaker.py
- Add record_mic.py: record audio from camera mic via RTSP to a
  timestamped WAV in data/
- Add private API camera dump to dump_camera.py
- Update README scripts section

play_speaker.py

@@ -0,0 +1,78 @@
+import os
+import subprocess
+
+import httpx
+from dotenv import load_dotenv
+
+load_dotenv()
+
+HOST = os.environ["HOST"]
+API_KEY = os.environ["API_KEY"]
+USERNAME = os.environ["UNIFI_USERNAME"]
+PASSWORD = os.environ["UNIFI_PASSWORD"]
+
+BASE = f"https://{HOST}/proxy/protect/integration/v1"
+PRIVATE_BASE = f"https://{HOST}/proxy/protect/api"
+
+CAMERA_NAME = "G6 Pro 360"
+AUDIO_FILE = "./data/hello.wav"
+SPEAKER_VOLUME = 50  # 0-100
+
+
+def set_speaker_volume(camera_id: str, volume: int):
+    # Accept-Encoding must be suppressed at request level — server returns 403 when present
+    with httpx.Client(verify=False, http2=True) as client:
+        res = client.post(
+            f"https://{HOST}/api/auth/login",
+            content=f'{{"username":"{USERNAME}","password":"{PASSWORD}","rememberMe":false}}'.encode(),
+            headers={"Content-Type": "application/json", "Accept-Encoding": ""},
+        )
+        res.raise_for_status()
+        csrf = res.headers.get("x-csrf-token")
+
+        def get_volumes():
+            s = client.get(f"{PRIVATE_BASE}/cameras/{camera_id}").raise_for_status().json()["speakerSettings"]
+            return s["volume"], s["speakerVolume"]
+
+        before = get_volumes()
+        print(f"Speaker volume before: volume={before[0]} speakerVolume={before[1]}")
+
+        client.patch(
+            f"{PRIVATE_BASE}/cameras/{camera_id}",
+            headers={"x-csrf-token": csrf},
+            json={"speakerSettings": {"volume": volume, "speakerVolume": volume}},
+        ).raise_for_status()
+
+        after = get_volumes()
+        print(f"Speaker volume after:  volume={after[0]} speakerVolume={after[1]}")
+
+
+def main():
+    with httpx.Client(headers={"X-API-Key": API_KEY}, verify=False) as client:
+        cameras = client.get(f"{BASE}/cameras").raise_for_status().json()
+        camera = next(c for c in cameras if CAMERA_NAME in c["name"])
+        print(f"Camera: {camera['name']} ({camera['id']})")
+
+        set_speaker_volume(camera["id"], SPEAKER_VOLUME)
+
+        session = client.post(f"{BASE}/cameras/{camera['id']}/talkback-session").raise_for_status().json()
+        print(f"Talkback: {session['url']} ({session['codec']} {session['samplingRate']}Hz)")
+
+        proc = subprocess.Popen([
+            "ffmpeg", "-re", "-i", AUDIO_FILE,
+            "-acodec", "libopus",
+            "-ar", str(session["samplingRate"]),
+            "-ac", "1",
+            "-b:a", "64k",
+            "-f", "rtp", session["url"],
+        ])
+
+        try:
+            proc.wait()
+        except KeyboardInterrupt:
+            proc.terminate()
+            proc.wait()
+
+
+if __name__ == "__main__":
+    main()