Feature request: Improve validation error message for task INT parameter range expressions

[ddneilson]

Use Case

The error message that is provided for a bad range expression for an INT type task parameter does not currently help the end-user understand what actually went wrong. For example, given:

specificationVersion: jobtemplate-2023-09
name: BadRangeExpr
steps:
  - name: Test
    parameterSpace:
      taskParameterDefinitions:
        - name: P
          type: INT
          range: "1-10:2,10"
    script:
      actions:
        onRun:
          command: bash
          args:
          - "-c"
          - "echo 'Hi'"

The error that we get from validation is:

% openjd check expr.template.yaml 
ERROR: 'expr.template.yaml' failed checks: 1 validation errors for JobTemplate
steps[0] -> parameterSpace -> taskParameterDefinitions[0] -> range:
	Failed to create IntRangeExpr

It points to the right place, but doesn't help someone understand what went wrong. Note that this is different from, say, making a syntax error like range: "1-10:2;10" which produces the error:

% openjd check expr.template.yaml
ERROR: 'expr.template.yaml' failed checks: 1 validation errors for JobTemplate
steps[0] -> parameterSpace -> taskParameterDefinitions[0] -> range:
	Unexpected ';' in '1-10:2;10' after '1-10:2'

There is a better error available, but it is not being surfaced:

% python
Python 3.9.6 (default, Feb  3 2024, 15:58:27) 
[Clang 15.0.0 (clang-1500.3.9.4)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import openjd.model._range_expr as r
>>> r1 = r.IntRange(1,10,1)
>>> r2 = r.IntRange(10,10,1)
>>> range_expr = r.IntRangeExpr([r1,r2])
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/neilsd/.venv/lib/python3.9/site-packages/openjd/model/_range_expr.py", line 49, in __init__
    self._validate()
  File "/Users/neilsd/.venv/lib/python3.9/site-packages/openjd/model/_range_expr.py", line 153, in _validate
    raise ValueError(
ValueError: Range expression is not valid due to overlapping ranges:
	1-10 overlaps with 10

Proposed Solution

Modify the model validation so that the internal ValueError's message is surfaced rather than the generic "Failed to create IntRangeExpr". i.e. The output should be:

% openjd check expr.template.yaml 
ERROR: 'expr.template.yaml' failed checks: 1 validation errors for JobTemplate
steps[0] -> parameterSpace -> taskParameterDefinitions[0] -> range:
	Not valid due to overlapping ranges:  1-10 overlaps with 10