JJ: Description from the destination commit:

~

JJ: Description from source commit:
handle global_fees; add do_management.sh

src/timestamp.mli

@@ -1,8 +1,8 @@
 (* TODO time
    uhuh!
    need to be int64 for binary/pg round trip
-
-   really need to fix this module *)
+   really need to fix this module
+   don't use option for never/forever *)
 
 type t = Ptime.t option
 type span = Ptime.Span.t option
@@ -10,17 +10,27 @@ type span = Ptime.Span.t option
 module Span : sig
   type t = span
 
+  val of_string : string -> (t, string) result
+  val pp : Stdlib.Format.formatter -> t -> unit
+
+  (* - *)
+
   val jsont : t Jsont.t
   val bin : t Bin.t
   val bin_nbo : t Bin.t
   val caqti : t Caqti_type.t
 end
 
+val epoch : t
 val diff : t -> t -> span
 val add_span_exn : t -> span -> t
 val of_span_exn : span -> t
 val compare : t -> t -> int option
 
+(* used for offline tool argument conversion *)
+val of_string : string -> (t, string) result
+val pp : Stdlib.Format.formatter -> t -> unit
+
 (* - *)
 val jsont : t Jsont.t
 val bin : t Bin.t