feat(form-builder): retry history table + integration (WS-6)

Per-attempt retry history (timestamp, user, outcome, exception detail
if failed) replaces the counter-only retry_count tracking.

Changes:

- New `form_submission_action_failure_retry_attempts` table (cascade on
  parent delete, nullOnDelete on user). Explicit short FK names
  (`fsafra_failure_fk`, `fsafra_user_fk`) — auto-generated names exceed
  MySQL's 64-char identifier limit.
- New FormSubmissionActionFailureRetryAttempt model + factory +
  succeeded() state.
- Parent FormSubmissionActionFailure gets retryAttempts() HasMany
  relation (latest('attempted_at')).
- New FormFailureRetryService centralises the retry-flow logic. Both
  the API controller and the artisan command delegate to it. Service
  writes a retry_attempt record per attempt; parent's retry_count
  stays as denormalised cache for index-view performance.
- Successful retry: attempt(succeeded) + parent.retry_count++ +
  parent.resolved_at + parent.resolved_by_user_id + parent.resolved_note
  ("Geslaagde retry door {actor.name}" or "Geslaagde retry
  (geautomatiseerd)" for command-line invocation without an actor).
- Failed retry: attempt(failed) with NEW exception details +
  parent.retry_count++. Parent's exception_class/_message stay
  audit-immutable — they represent the FIRST failure.
- canBeRetried() now correctly checks both resolved_at AND
  dismissed_at (sessie 2's open question Q2 closure).
- New FailureNotRetriableException (controller → 422) and
  ParentSubmissionGoneException (controller → 410) for cleaner
  flow control.

12 new tests:
- FormSubmissionActionFailureRetryAttemptTest (5 unit tests)
- RetryFlowProducesRetryAttemptsTest (7 integration tests covering
  succeeded path, failed path, resolved/dismissed blocking,
  multiple-retries chronological ordering, canBeRetried truth tables)

Pre-existing tests touched:
- FormSubmissionActionFailureTest::test_can_be_retried_only_for_open_state
  — updated to reflect Q2 closure (resolved now blocks too).
- Ws6FoundationMigrationTest::test_down_methods_clean_up_columns_and_table
  — child table must drop before parent (FK constraint).
- 5 backfill test step-counts bumped +1 (new migration sits at top).

SCHEMA.md → v2.9. Schema dump regenerated.

Refs: RFC-WS-6.md §3 Q5 addendum, sessie 2 Q2

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

api/tests/Feature/FormBuilder/Options/FormFieldOptionsBackfillTest.php

@@ -47,7 +47,7 @@ final class FormFieldOptionsBackfillTest extends TestCase
         // Roll back only the backfill migration (latest WS-5d step).
         // Leaves the form_field_options table in place, JSON columns
         // present on the source tables, and snapshots in pre-WS-5d shape.
-        $this->artisan('migrate:rollback', ['--step' => 4])->assertSuccessful();
+        $this->artisan('migrate:rollback', ['--step' => 5])->assertSuccessful();
         $this->assertTrue(Schema::hasTable('form_field_options'));
         $this->assertTrue(Schema::hasColumn('form_fields', 'options'));
 
@@ -136,7 +136,7 @@ final class FormFieldOptionsBackfillTest extends TestCase
 
     public function test_rollback_reconstructs_json_columns_and_snapshots(): void
     {
-        $this->artisan('migrate:rollback', ['--step' => 4])->assertSuccessful();
+        $this->artisan('migrate:rollback', ['--step' => 5])->assertSuccessful();
         [$selectId, $multiId, $libraryId] = $this->seedFieldsAndLibraryWithJson();
         $submissionId = $this->seedSubmissionWithSnapshot($selectId);
 
@@ -149,7 +149,7 @@ final class FormFieldOptionsBackfillTest extends TestCase
 
         // Step back over only the backfill migration → JSON columns repopulate
         // and snapshots revert to flat-string-array shape.
-        $this->artisan('migrate:rollback', ['--step' => 4])->assertSuccessful();
+        $this->artisan('migrate:rollback', ['--step' => 5])->assertSuccessful();
         $this->assertSame(0, DB::table('form_field_options')->count());
 
         $select = DB::table('form_fields')->where('id', $selectId)->first();
@@ -168,7 +168,7 @@ final class FormFieldOptionsBackfillTest extends TestCase
 
     public function test_fails_when_options_present_on_non_option_field_type(): void
     {
-        $this->artisan('migrate:rollback', ['--step' => 4])->assertSuccessful();
+        $this->artisan('migrate:rollback', ['--step' => 5])->assertSuccessful();
         $this->seedFieldWithOptions('TAG_PICKER', ['Veiligheid', 'Horeca']);
 
         $this->expectException(\RuntimeException::class);
@@ -178,7 +178,7 @@ final class FormFieldOptionsBackfillTest extends TestCase
 
     public function test_fails_when_options_contains_non_string_entry(): void
     {
-        $this->artisan('migrate:rollback', ['--step' => 4])->assertSuccessful();
+        $this->artisan('migrate:rollback', ['--step' => 5])->assertSuccessful();
 
         $this->seedFieldWithOptionsRaw('SELECT', json_encode([
             ['label' => 'A'],
@@ -192,7 +192,7 @@ final class FormFieldOptionsBackfillTest extends TestCase
 
     public function test_fails_when_options_is_object_shape(): void
     {
-        $this->artisan('migrate:rollback', ['--step' => 4])->assertSuccessful();
+        $this->artisan('migrate:rollback', ['--step' => 5])->assertSuccessful();
 
         $this->seedFieldWithOptionsRaw('SELECT', json_encode([
             'XS' => 'Extra small',
@@ -206,7 +206,7 @@ final class FormFieldOptionsBackfillTest extends TestCase
 
     public function test_fails_on_translations_length_mismatch(): void
     {
-        $this->artisan('migrate:rollback', ['--step' => 4])->assertSuccessful();
+        $this->artisan('migrate:rollback', ['--step' => 5])->assertSuccessful();
         $this->seedFieldWithOptionsRaw('SELECT', json_encode(['XS', 'S', 'M']), json_encode([
             'de' => ['options' => ['Klein', 'Mittel']], // 2 vs 3
         ]));
@@ -218,7 +218,7 @@ final class FormFieldOptionsBackfillTest extends TestCase
 
     public function test_fails_on_non_string_translation(): void
     {
-        $this->artisan('migrate:rollback', ['--step' => 4])->assertSuccessful();
+        $this->artisan('migrate:rollback', ['--step' => 5])->assertSuccessful();
         $this->seedFieldWithOptionsRaw('SELECT', json_encode(['XS', 'S']), json_encode([
             'de' => ['options' => ['Klein', 42]],
         ]));
@@ -230,7 +230,7 @@ final class FormFieldOptionsBackfillTest extends TestCase
 
     public function test_fails_on_oversized_translation(): void
     {
-        $this->artisan('migrate:rollback', ['--step' => 4])->assertSuccessful();
+        $this->artisan('migrate:rollback', ['--step' => 5])->assertSuccessful();
         $this->seedFieldWithOptionsRaw('SELECT', json_encode(['XS']), json_encode([
             'de' => ['options' => [str_repeat('x', 256)]],
         ]));
@@ -242,7 +242,7 @@ final class FormFieldOptionsBackfillTest extends TestCase
 
     public function test_fails_when_snapshot_options_present_on_non_option_field_type(): void
     {
-        $this->artisan('migrate:rollback', ['--step' => 4])->assertSuccessful();
+        $this->artisan('migrate:rollback', ['--step' => 5])->assertSuccessful();
         $this->seedTemplateWithSnapshotRaw([
             'fields' => [[
                 'id' => (string) Str::ulid(),