Add matched training signals, daily recovery and performance analysis

docs/DEPLOYMENT.md

@@ -1,6 +1,24 @@
 # Dokku deployment
 
 App: `stride`; database: `stride-db`; domain: `stride.peterstockings.com`.
+
+Training-signal releases migrate private daily recovery and session preferences
+automatically. Back up PostgreSQL before release, then recompute older recordings:
+
+```sh
+dokku run stride env FLASK_APP=app flask backfill-analysis --batch-size 20
+dokku run stride env FLASK_APP=app flask install-training-signals --email ACCOUNT
+dokku run stride env FLASK_APP=app flask backfill-health --email ACCOUNT --days 90
+```
+
+The installer validates queries before saving, pins five analyses and preserves
+existing edits on repeat runs. Pace and long-run thresholds are editable CLI
+options and account queries. Recovery backfill uses the existing encrypted
+session and account lock, enables recovery only for that account and leaves
+missing watch observations missing. Other accounts can opt in through Settings;
+recovery failures do not stop activity imports. Never run a local copy of the
+same Garmin session concurrently with production. Analysis version 3 persists
+continuous windows; no dashboard query loads full recording samples.
 The Dockerfile installs locked dependencies on Python 3.12. Dokku runs database
 migrations in the predeploy step, then one web container and one sync worker.