fix: align smoothing feasibility and option flow

ClumsyPilot/tests/verify_path_smoothing_runner.ps1

@@ -36,7 +36,15 @@ $root = 'MultiWheelC.TrajectoryPlanning.PathSmoothing.'
 $algorithms = $root + 'Algorithms.'
 $runnerType = Get-RequiredType ($algorithms + 'SmoothingAlgorithmRunner')
 $smootherType = Get-RequiredType ($algorithms + 'IPathSmoother')
+$candidateType = Get-RequiredType ($algorithms + 'SmoothingCandidate')
+$candidateStatusType = Get-RequiredType ($algorithms + 'SmoothingCandidateStatus')
 Assert-False $smootherType.IsPublic 'IPathSmoother must remain internal to the algorithm assembly.'
+Assert-Equal 3 ([Enum]::GetNames($candidateStatusType).Length) 'Smoothing candidate status must contain only the three defined feasibility states.'
+Assert-Equal 'Success' ([Enum]::GetNames($candidateStatusType)[0]) 'Candidate status must expose Success.'
+Assert-Equal 'RetryableInfeasible' ([Enum]::GetNames($candidateStatusType)[1]) 'Candidate status must expose RetryableInfeasible.'
+Assert-Equal 'Failed' ([Enum]::GetNames($candidateStatusType)[2]) 'Candidate status must expose Failed.'
+$retryableFactory = $candidateType.GetMethod('RetryableInfeasible', [Reflection.BindingFlags]'Static,NonPublic')
+Assert-True ($null -ne $retryableFactory) 'SmoothingCandidate must create retryable infeasibility without executable geometry.'
 
 $hooksType = $runnerType.GetNestedType('TestHooks', [Reflection.BindingFlags]'Public,NonPublic')
 Assert-True ($null -ne $hooksType) 'SmoothingAlgorithmRunner must expose its narrowly scoped nested TestHooks helper.'
@@ -47,12 +55,12 @@ function Invoke-Scenario([string]$Scenario) {
     return $executeMethod.Invoke($null, @($Scenario))
 }
 
-$allRejected = Invoke-Scenario 'RejectAll'
-Assert-Equal 'Infeasible' $allRejected.Status 'All rejected finite candidates must produce an Infeasible runner result.'
-Assert-AttemptedStrengths $allRejected @(1.00, 0.75, 0.50, 0.25) 'Rejected candidates must use the finite retry schedule exactly.'
-Assert-Equal 0 $allRejected.AcceptedPathPointCount 'An infeasible runner result must not retain a rejected candidate as an accepted path.'
-Assert-True ($allRejected.RejectedComparisonCandidatePointCount -gt 0) 'Only comparison diagnostics may retain the last rejected candidate geometry.'
-Assert-Equal 4 $allRejected.FailureCount 'Every rejected validation attempt must retain its failure reason.'
+$allRetryable = Invoke-Scenario 'RetryableInfeasible'
+Assert-Equal 'Infeasible' $allRetryable.Status 'Exhausted retryable infeasibility must produce an Infeasible runner result.'
+Assert-AttemptedStrengths $allRetryable @(1.00, 0.75, 0.50, 0.25) 'Retryable infeasibility must use the finite retry schedule exactly.'
+Assert-Equal 0 $allRetryable.AcceptedPathPointCount 'An infeasible runner result must not retain a retryable candidate as an accepted path.'
+Assert-Equal 0 $allRetryable.RejectedComparisonCandidatePointCount 'Retryable infeasibility must not retain executable candidate geometry.'
+Assert-Equal 4 $allRetryable.FailureCount 'Every retryable attempt must retain its failure reason.'
 
 $accepted = Invoke-Scenario 'AcceptFirst'
 Assert-Equal 'Success' $accepted.Status 'The first safe candidate must be accepted.'
@@ -60,10 +68,10 @@ Assert-AttemptedStrengths $accepted @(1.00) 'The runner must stop immediately af
 Assert-True ($accepted.AcceptedPathPointCount -gt 0) 'A successful runner result must publish the validated path internally.'
 Assert-Equal 0 $accepted.RejectedComparisonCandidatePointCount 'An accepted candidate must not create rejected comparison geometry.'
 
-$numericalFailure = Invoke-Scenario 'NumericalFailure'
-Assert-Equal 'Failed' $numericalFailure.Status 'A numerical candidate failure must stop the runner as Failed.'
-Assert-AttemptedStrengths $numericalFailure @(1.00) 'Numerical candidate failure must not retry at lower strength.'
-Assert-Equal 0 $numericalFailure.RejectedComparisonCandidatePointCount 'A non-candidate numerical failure must not retain comparison geometry.'
+$terminalFailure = Invoke-Scenario 'TerminalFailed'
+Assert-Equal 'Failed' $terminalFailure.Status 'A terminal candidate failure must stop the runner as Failed.'
+Assert-AttemptedStrengths $terminalFailure @(1.00) 'Terminal candidate failure must run exactly once.'
+Assert-Equal 0 $terminalFailure.RejectedComparisonCandidatePointCount 'A terminal failure must not retain comparison geometry.'
 
 $cancelled = Invoke-Scenario 'CancelBeforeNextAttempt'
 Assert-True $cancelled.CancellationPropagated 'Cancellation between attempts must propagate out of the runner.'