Initial commit: adacam-api v1.0.0

Clean Python Flask replacement for odc-api (434k lines Node.js → ~350 lines Python)
- GET /api/1/landmarks/last/{N} - last N detections from SQLite
- POST /api/1/landmarks - ingest detections + forward to AdaMaps
- GET /api/1/gnssConcise/latestValid - GPS fix from Redis
- GET /api/1/status - device status
- GET /api/1/deviceinfo - device identity
- GET /api/1/recording/frames/latest - latest frame path

No /api/1/cmd - that's the CVE, it's gone.

Includes:
- SQLite for local storage + offline queue
- Background thread for AdaMaps retry
- systemd service unit
- install.sh for device deployment

adacam_api/forwarder.py

@@ -0,0 +1,83 @@
+"""AdaMaps forwarding with offline queue."""
+import threading
+import time
+import requests
+from . import config, db
+
+_thread = None
+_running = False
+
+
+def forward_detection(data):
+    """Forward a detection to AdaMaps, queue if offline."""
+    api_url = config.get("adamaps_api", "https://api.adamaps.org")
+    api_key = config.get("adamaps_key", "")
+    device_id = config.get("device_id", "unknown")
+    
+    payload = {
+        "device_id": device_id,
+        "detection": data,
+    }
+    
+    try:
+        resp = requests.post(
+            f"{api_url}/api/ingest",
+            json=payload,
+            headers={"X-AdaMaps-Key": api_key},
+            timeout=10,
+        )
+        if resp.status_code == 200:
+            return True
+    except requests.RequestException:
+        pass
+    
+    # Queue for retry
+    db.queue_forward(payload)
+    return False
+
+
+def _retry_loop():
+    """Background thread to retry queued forwards."""
+    global _running
+    while _running:
+        try:
+            items = db.pop_queue(limit=20)
+            if not items:
+                time.sleep(30)
+                continue
+            
+            api_url = config.get("adamaps_api", "https://api.adamaps.org")
+            api_key = config.get("adamaps_key", "")
+            
+            for _, payload in items:
+                try:
+                    resp = requests.post(
+                        f"{api_url}/api/ingest",
+                        json=payload,
+                        headers={"X-AdaMaps-Key": api_key},
+                        timeout=10,
+                    )
+                    if resp.status_code != 200:
+                        db.queue_forward(payload)
+                except requests.RequestException:
+                    db.queue_forward(payload)
+                    time.sleep(5)
+            
+            time.sleep(5)
+        except Exception:
+            time.sleep(30)
+
+
+def start_retry_thread():
+    """Start the background retry thread."""
+    global _thread, _running
+    if _thread is None or not _thread.is_alive():
+        _running = True
+        _thread = threading.Thread(target=_retry_loop, daemon=True)
+        _thread.start()
+
+
+def stop_retry_thread():
+    """Stop the background retry thread."""
+    global _running
+    _running = False