Replace scs postgresstore with a sqlc-backed SessionStore.

Keep scs for cookies and session API while sessions DDL and queries live in the same sqlc stack as the rest of Postgres.

internal/store/sqlc/sessions.sql.go

@@ -0,0 +1,62 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.31.1
+// source: sessions.sql
+
+package sqlc
+
+import (
+	"context"
+	"time"
+)
+
+const deleteExpiredSessions = `-- name: DeleteExpiredSessions :exec
+DELETE FROM sessions
+WHERE expiry <= now()
+`
+
+func (q *Queries) DeleteExpiredSessions(ctx context.Context) error {
+	_, err := q.db.ExecContext(ctx, deleteExpiredSessions)
+	return err
+}
+
+const deleteSession = `-- name: DeleteSession :exec
+DELETE FROM sessions
+WHERE token = $1
+`
+
+func (q *Queries) DeleteSession(ctx context.Context, token string) error {
+	_, err := q.db.ExecContext(ctx, deleteSession, token)
+	return err
+}
+
+const getSession = `-- name: GetSession :one
+SELECT data
+FROM sessions
+WHERE token = $1 AND expiry > now()
+`
+
+func (q *Queries) GetSession(ctx context.Context, token string) ([]byte, error) {
+	row := q.db.QueryRowContext(ctx, getSession, token)
+	var data []byte
+	err := row.Scan(&data)
+	return data, err
+}
+
+const upsertSession = `-- name: UpsertSession :exec
+INSERT INTO sessions (token, data, expiry)
+VALUES ($1, $2, $3)
+ON CONFLICT (token) DO UPDATE
+SET data = excluded.data, expiry = excluded.expiry
+`
+
+type UpsertSessionParams struct {
+	Token  string
+	Data   []byte
+	Expiry time.Time
+}
+
+func (q *Queries) UpsertSession(ctx context.Context, arg UpsertSessionParams) error {
+	_, err := q.db.ExecContext(ctx, upsertSession, arg.Token, arg.Data, arg.Expiry)
+	return err
+}