Add Pi-side upload client for Phase 9 remote server

- app_sql.py: add UPLOADED column + migration on tracking table, add
  settings and dashcam_uploads tables, add helpers for unsent-row
  queries, marking rows uploaded, and dashcam upload dedupe tracking.
- app_upload.py: new background upload client. Periodically batches
  unsent tracking rows to POST /api/v1/tracking/batch and uploads new
  dashcam files (sha256-verified) to POST /api/v1/dashcam/upload, with
  exponential backoff on failure. Exposes get_status() and a
  dashcam-upload enable/disable toggle backed by the settings table.
- app.py: start the upload client thread at startup, add
  GET /api/upload/status and POST /api/upload/dashcam_toggle routes.
- dash.html/dash.js: add a "Remote server upload" card with upload
  status and a toggle switch to pause dashcam video uploads while
  trip/GPS log uploads keep running (per user request - useful on a
  slow/metered connection).
- db/upload_creds.env: new gitignore-exempted template (mirrors
  db/creds.env) for YARIS_SERVER_URL/YARIS_DEVICE_NAME/YARIS_API_KEY.
- requirements.txt: add requests.

Tested against the real deployed unraid server: tracking batch upload
+ dedupe, dashcam upload + dedupe, and toggle-off correctly pausing
dashcam uploads while tracking uploads continue. Also verified the
full Flask app imports/runs cleanly and the new API routes + dash.html
toggle render correctly in a headless browser.

Co-authored-by: Copilot <[email protected]>

app.py

@@ -1,5 +1,5 @@
-from flask import Flask, render_template, make_response, json, jsonify
-from modules import app_gps, app_events, app_car, app_account, app_gps,app_obd, app_sql, app_dash
+from flask import Flask, render_template, make_response, json, jsonify, request
+from modules import app_gps, app_events, app_car, app_account, app_gps,app_obd, app_sql, app_dash, app_upload
 import time
 from gevent.pywsgi import WSGIServer
 
@@ -12,6 +12,7 @@ obd = app_obd.OBD()
 car = app_car.Car()
 gps = app_gps.start_gps()
 app_sql.start_logging()
+app_upload.start_uploading()
 
 @app.route('/')
 def index():
@@ -37,6 +38,18 @@ def dash_import():
     summary = app_dash.import_dashcam()
     return jsonify(summary)
 
+@app.route('/api/upload/status')
+def upload_status():
+    return jsonify(app_upload.get_status())
+
+@app.route('/api/upload/dashcam_toggle', methods=['POST'])
+def upload_dashcam_toggle():
+    body = request.get_json(silent=True) or {}
+    if "enabled" not in body:
+        return jsonify(error="expected JSON body {'enabled': true|false}"), 400
+    app_upload.set_dashcam_upload_enabled(bool(body["enabled"]))
+    return jsonify(app_upload.get_status())
+
 # not sure if im gonna use this
 @app.route('/api/obd_speed/')
 def data():