switch backup + offsite sync from weekly to daily — RPO 7d → 1d [ci skip]

- weekly-backup.timer: Sun 05:00 → daily 05:00
- offsite-sync-backup.timer: Sun 08:00 → daily 06:00
- Monthly full rsync --delete unchanged (1st-7th of month)
- Total daily I/O cost: ~20GB sdc reads, ~3.5GB sda writes, seconds of network
- Updated script headers and service descriptions

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/offsite-sync-backup.service

@@ -1,5 +1,5 @@
 [Unit]
-Description=Weekly offsite sync: rsync /mnt/backup to Synology NAS
+Description=Daily offsite sync: sda + NFS changes to Synology
 After=network-online.target weekly-backup.service
 
 [Service]

scripts/offsite-sync-backup.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 # offsite-sync-backup — Sync backups to Synology NAS
 # Deploy to PVE host at /usr/local/bin/offsite-sync-backup
-# Schedule: Weekly Sunday 08:00 via systemd timer (After=weekly-backup.service)
+# Schedule: Daily 06:00 via systemd timer (After=weekly-backup.service)
 #
 # Two sync paths:
 #   Step 1: sda (/mnt/backup) → Synology pve-backup/ (PVC snapshots, pfsense, pve-config, sqlite)

scripts/offsite-sync-backup.timer

@@ -1,8 +1,8 @@
 [Unit]
-Description=Weekly offsite sync: rsync /mnt/backup to Synology NAS
+Description=Daily offsite sync: sda + NFS changes to Synology
 
 [Timer]
-OnCalendar=Sun *-*-* 08:00:00
+OnCalendar=*-*-* 06:00:00
 Persistent=true
 RandomizedDelaySec=300
 

scripts/weekly-backup.service

@@ -1,5 +1,5 @@
 [Unit]
-Description=Weekly backup: rsync NFS to sda + prune snapshots
+Description=Daily backup: PVC snapshots + SQLite + pfsense to sda
 After=network-online.target
 
 [Service]

scripts/weekly-backup.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
-# weekly-backup — 3-2-1 backup: NFS mirror + PVC file copy + pfsense + PVE config
+# weekly-backup — 3-2-1 backup: PVC file copy + SQLite + pfsense + PVE config to sda
 # Deploy to PVE host at /usr/local/bin/weekly-backup
-# Schedule: Weekly Sunday 05:00 via systemd timer
+# Schedule: Daily 05:00 via systemd timer
 set -euo pipefail
 
 # --- Configuration ---

scripts/weekly-backup.timer

@@ -1,8 +1,8 @@
 [Unit]
-Description=Weekly backup: rsync NFS to sda + prune snapshots
+Description=Daily backup: PVC snapshots + SQLite + pfsense to sda
 
 [Timer]
-OnCalendar=Sun *-*-* 05:00:00
+OnCalendar=*-*-* 05:00:00
 Persistent=true
 RandomizedDelaySec=300