Adding priorities to UserDemand / Time skips part of validation

[Huite]

This may essentially be a duplicate of #1250, but I'm reporting it anyway.

If I set a single priority (1) in the UserDemand table, but forget to include return flow edges, I get the (very useful) validation error:

❯ c:\bin\ribasim\bin\ribasim.exe ribasim.toml

┌ Info: Starting a Ribasim simulation.
│   cli.ribasim_version = "2024.4.0"
│   starttime = 2017-01-01T00:00:00
└   endtime = 2019-01-01T00:00:00
┌ Error: UserDemand #118 must have at least 1 flow inneighbor(s) (got 0).
└ @ Ribasim D:\buildAgent\work\ecd2b8f9b25b1609\ribasim\core\src\validation.jl:443
┌ Error: UserDemand #119 must have at least 1 flow inneighbor(s) (got 0).
┌ Error: UserDemand #121 must have at least 1 flow inneighbor(s) (got 0).
└ @ Ribasim D:\buildAgent\work\ecd2b8f9b25b1609\ribasim\core\src\validation.jl:443
┌ Error: UserDemand #122 must have at least 1 flow inneighbor(s) (got 0).
└ @ Ribasim D:\buildAgent\work\ecd2b8f9b25b1609\ribasim\core\src\validation.jl:443
┌ Error: UserDemand #123 must have at least 1 flow inneighbor(s) (got 0).
└ @ Ribasim D:\buildAgent\work\ecd2b8f9b25b1609\ribasim\core\src\validation.jl:443
┌ Error: UserDemand #124 must have at least 1 flow inneighbor(s) (got 0).
└ @ Ribasim D:\buildAgent\work\ecd2b8f9b25b1609\ribasim\core\src\validation.jl:443
┌ Error: UserDemand #125 must have at least 1 flow inneighbor(s) (got 0).
└ @ Ribasim D:\buildAgent\work\ecd2b8f9b25b1609\ribasim\core\src\validation.jl:443
┌ Error: UserDemand #126 must have at least 1 flow inneighbor(s) (got 0).
└ @ Ribasim D:\buildAgent\work\ecd2b8f9b25b1609\ribasim\core\src\validation.jl:443
┌ Error: UserDemand #127 must have at least 1 flow inneighbor(s) (got 0).
└ @ Ribasim D:\buildAgent\work\ecd2b8f9b25b1609\ribasim\core\src\validation.jl:443
┌ Error: UserDemand #128 must have at least 1 flow inneighbor(s) (got 0).
└ @ Ribasim D:\buildAgent\work\ecd2b8f9b25b1609\ribasim\core\src\validation.jl:443
┌ Error: UserDemand #129 must have at least 1 flow inneighbor(s) (got 0).
└ @ Ribasim D:\buildAgent\work\ecd2b8f9b25b1609\ribasim\core\src\validation.jl:443
┌ Error: UserDemand #130 must have at least 1 flow inneighbor(s) (got 0).
└ @ Ribasim D:\buildAgent\work\ecd2b8f9b25b1609\ribasim\core\src\validation.jl:443
┌ Error: UserDemand #131 must have at least 1 flow inneighbor(s) (got 0).
└ @ Ribasim D:\buildAgent\work\ecd2b8f9b25b1609\ribasim\core\src\validation.jl:443
┌ Error: UserDemand #132 must have at least 1 flow inneighbor(s) (got 0).
└ @ Ribasim D:\buildAgent\work\ecd2b8f9b25b1609\ribasim\core\src\validation.jl:443
ERROR: Invalid number of connections for certain node types.

Adding priorities [1, 2, 3] seems to result in skipping this validation step?

❯ c:\bin\ribasim\bin\ribasim.exe ribasim.toml

┌ Info: Starting a Ribasim simulation.
│   cli.ribasim_version = "2024.4.0"
│   starttime = 2017-01-01T00:00:00
└   endtime = 2019-01-01T00:00:00
ERROR: BoundsError: attempt to access 0-element Vector{Float64} at index [1]
Stacktrace:
  [1] getindex
    @ .\essentials.jl:13 [inlined]
  [2] get_scalar_interpolation(starttime::Dates.DateTime, t_end::Float64, time::StructArrays.StructVector{Ribasim.UserDemandTimeV1, @NamedTuple{node_id::Vector{Int64}, time::Vector{Dates.DateTime}, demand::Vector{Float64}, return_fa
ctor::Vector{Float64}, min_level::Vector{Float64}, priority::Vector{Int64}}, Int64}, node_id::Ribasim.NodeID, param::Symbol; default_value::Float64)
    @ Ribasim D:\buildAgent\work\ecd2b8f9b25b1609\ribasim\core\src\util.jl:215
  [3] Ribasim.UserDemand(db::SQLite.DB, config::Ribasim.config.Config)
    @ Ribasim D:\buildAgent\work\ecd2b8f9b25b1609\ribasim\core\src\read.jl:703
  [4] Ribasim.Parameters(db::SQLite.DB, config::Ribasim.config.Config)
    @ Ribasim D:\buildAgent\work\ecd2b8f9b25b1609\ribasim\core\src\read.jl:893
  [5] Ribasim.Model(config::Ribasim.config.Config)
    @ Ribasim D:\buildAgent\work\ecd2b8f9b25b1609\ribasim\core\src\model.jl:51
  [6] run(config::Ribasim.config.Config)
    @ Ribasim D:\buildAgent\work\ecd2b8f9b25b1609\ribasim\core\src\main.jl:11
  [7] (::Ribasim.var"#206#208"{Ribasim.config.Config})()
    @ Ribasim D:\buildAgent\work\ecd2b8f9b25b1609\ribasim\core\src\main.jl:66
  [8] with_logstate(f::Function, logstate::Any)
    @ Base.CoreLogging .\logging.jl:515
  [9] with_logger
    @ Base.CoreLogging .\logging.jl:627 [inlined]
 [10] #205
    @ Ribasim D:\buildAgent\work\ecd2b8f9b25b1609\ribasim\core\src\main.jl:59 [inlined]
 [11] open(::Ribasim.var"#205#207"{Ribasim.config.Config}, ::String, ::Vararg{String}; kwargs::@Kwargs{})
    @ Base .\io.jl:396
 [12] open
    @ Base .\io.jl:393 [inlined]
 [13] main(ARGS::Vector{String})
    @ Ribasim D:\buildAgent\work\ecd2b8f9b25b1609\ribasim\core\src\main.jl:56
 [14] main()
    @ Ribasim D:\buildAgent\work\ecd2b8f9b25b1609\ribasim\core\src\main.jl:24
 [15] top-level scope
    @ none:1
```