Per-database snapshot and retention settings

[moll]

Hey,

Thanks for maintaining Litestream!

Have you considered per-database custom snapshot and retention settings? I realize one could just run different instances of Litestream, but right now Litestream sits between the space of assuming one instance running (with reliance on a global /etc/litestream.yml config and defaulting to /var/run/litestream.sock) and multiple instances (due to some configuration parameters being only global).

At least reading today's main's config parsing, I don't see any per-database snapshot settings:

litestream/cmd/litestream/main.go

Lines 620 to 637 in 0b3facd

	type DBConfig struct {
	Path string `yaml:"path"`
	Dir string `yaml:"dir"` // Directory to scan for databases
	Pattern string `yaml:"pattern"` // File pattern to match (e.g., "*.db", "*.sqlite")
	Recursive bool `yaml:"recursive"` // Scan subdirectories recursively
	Watch bool `yaml:"watch"` // Enable directory monitoring for changes
	MetaPath *string `yaml:"meta-path"`
	MonitorInterval *time.Duration `yaml:"monitor-interval"`
	CheckpointInterval *time.Duration `yaml:"checkpoint-interval"`
	BusyTimeout *time.Duration `yaml:"busy-timeout"`
	MinCheckpointPageN *int `yaml:"min-checkpoint-page-count"`
	TruncatePageN *int `yaml:"truncate-page-n"`
	RestoreIfDBNotExists bool `yaml:"restore-if-db-not-exists"`
	Replica *ReplicaConfig `yaml:"replica"`
	Replicas []*ReplicaConfig `yaml:"replicas"` // Deprecated
	}

Thanks!