Code review fixes: app 2.9.0, server 2.2.0

Telemetry no longer loses queued batches. The server drops a bad value,
or a sample without a plausible time, instead of rejecting the batch,
and answers 200 with what it dropped. The app sends only values inside
the server's ranges (speed as a magnitude, so reversing is fine) and no
samples before the head unit's clock is set.

Server:
- Pairing hands out and accepts a token only after the device is saved;
  a failed save leaves the request pending.
- A paired token serves only the installation id it was paired with
  (403 otherwise); the shared INGEST_TOKEN still serves any.
- Wrong-password lockouts and open pairing requests are limited per
  client address (last X-Forwarded-For entry), so a stranger cannot
  lock the owner out; a car starting again replaces its own request.
- ABRP forwarding skips samples stamped ahead of the server's clock,
  which used to stop it until a restart.

App:
- Settings written to plaintext during a keystore failure move back
  into encrypted storage; the stored installation id wins.
- The installation id is derived from ANDROID_ID on first start, so a
  reinstall finds its history; a stored or imported id still wins.
- The scanned config file is deleted after import (it holds the token).
- GPS stops while live telemetry is off or the server unconfigured, and
  pauses while parked and idle, keeping the fix the car parked with.
- Range estimates use the monotonic clock.
- One HTTP helper (ServerHttp) for telemetry, sync and pairing.
- Last Turkish strings translated; mise logs shows the NilsMG4 tags.

Grafana reads InfluxDB with its own read-only token (new grafana-influx
Secret, created by hand as described in k8s/README.md).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QLJfZQZeAKAwSqViTmLzki

README.md

@@ -131,13 +131,18 @@ out keep their current value:
 ```
 server_url      = https://car.k8s.stinnesbeck.com
 token           = the server's INGEST_TOKEN (not needed after pairing)
-installation_id = keep the old one when reinstalling, so history stays together
+installation_id = only to carry over history from an install older than 2.9.0
 interval_sec    = 60      # 15 / 30 / 60 / 120 / 300
 boost_low_soc   = true
 low_soc_percent = 20
 ```
 
-The file is read once and not kept; credentials live only in the app's encrypted store.
+After a successful import the app deletes the file, since it holds the token; credentials live
+only in the app's encrypted store.
+
+The installation ID is derived from the head unit, so a reinstall finds its history again on its
+own. `installation_id` is only needed to carry history over from an install made before 2.9.0.
+A paired token belongs to one installation ID: after changing the ID, pair again.
 
 ### Power