add filter "home-assistant-backup"

The backup list and timestamps change with every automatic backup, and the password decrypts the backup archives.

Paths missing from the file are left absent instead of being created with null.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

gitconfig

@@ -52,6 +52,11 @@
 	smudge = cat
 	required = true
 
+[filter "home-assistant-backup"]
+	clean = "jq 'reduce ([\"data\", \"backups\"], [\"data\", \"config\", \"last_attempted_automatic_backup\"], [\"data\", \"config\", \"last_completed_automatic_backup\"], [\"data\", \"config\", \"create_backup\", \"password\"]) as $p (.; if getpath($p) != null then setpath($p; \"…\") else . end)'"
+	smudge = cat
+	required = true
+
 [filter "home-assistant-config-entries"]
 	clean = jq '.data.entries[].data |= with_entries(if (.key | IN(\"password\", \"access_token\", \"noise_psk\")) and .value != null then .value = \"…\" else . end)' | eval \"$(git config --get filter.truncate-mac-address-to-24-bits.clean)\" | eval \"$(git config --get filter.truncate-dyness-battery-serial-numbers.clean)\"
 	smudge = cat