feat: add Actions tab on AccidentInvestigation (curative/corrective subtasks)

[elisa34]

Summary

• Add digirisk_action_type select extrafield on projet_task to distinguish curative (1) vs corrective (2) actions
• Set the extrafield on T1/T2 task creation in accidentinvestigation_card.php
• SQL migration to backfill existing T1/T2 tasks from their label prefix
• New Actions tab on the AccidentInvestigation fiche (between Participants and Notes):
  • Two sections (curative / corrective) each with a row count badge
  • Inline add-form using native Dolibarr selectDate() and select_dolusers()
  • Checkbox to mark an action as done (progress = 100)
  • Inline progress input (0-100 %) with submit button
  • Status rendered via Task::LibStatut(4) (native Dolibarr badge)
  • Progress bar via native Dolibarr CSS classes (progress sm / progress-bar-info/success)
  • Helper getAccidentInvestigationActionsByType() with correlated subquery for TASKEXECUTIVE assignee
• Add langs/en_US/digiriskdolibarr.lang; extend fr_FR with all action-tab keys

Test plan

• Validate an AccidentInvestigation ? confirm T1 and T2 subtasks are created with digirisk_action_type 1 and 2
• Open the Actions tab ? two sections visible, "no actions" message if empty
• Add a curative action with label, deadline, assignee ? row appears in table
• Check progress bar and status badge use native Dolibarr rendering
• Check the inline progress input saves correctly
• Check the checkbox marks action as done (progress = 100, bar turns green)
• Run SQL migration on existing data ? T1/T2 tasks correctly typed

?? Generated with Claude Code