fix(custom-fields) : prevent data loss on ModelType save + restoration scripts

Backend: match existing CustomField by name as fallback when ID is not provided,
preventing deletion and recreation of field definitions (which cascade-deletes values).

Includes restoration/migration scripts for prod:
- restore-custom-field-values.php: restores piece values from audit logs
- migrate-orphaned-custom-fields.php: migrates values from orphaned CFs
- fix-prod-all.php: combined fix (migrate + restore + cleanup)
- fix-prod-recreate-and-migrate.php: full fix (recreate missing CFs + migrate + restore)
- check-prod-*.php: diagnostic scripts

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/verify-prod-health.php

@@ -0,0 +1,95 @@
+<?php
+
+declare(strict_types=1);
+
+require_once __DIR__.'/../vendor/autoload.php';
+
+use Doctrine\DBAL\DriverManager;
+
+$conn = DriverManager::getConnection([
+    'driver' => 'pdo_pgsql',
+    'host' => 'localhost',
+    'port' => 5432,
+    'dbname' => 'inventory',
+    'user' => 'ferme_user',
+    'password' => 'fermerecette',
+]);
+
+echo "=== CUSTOM FIELDS HEALTH CHECK ===\n\n";
+
+// 1. Orphaned CFs (should be 0)
+$orphanedCfs = $conn->fetchOne('SELECT COUNT(*) FROM custom_fields WHERE typecomposantid IS NULL AND typepieceid IS NULL AND typeproductid IS NULL');
+echo sprintf("1. Orphaned CF definitions: %d %s\n", $orphanedCfs, 0 == $orphanedCfs ? '[OK]' : '[PROBLEM]');
+
+// 2. Orphaned CFValues (pointing to orphaned CFs)
+$orphanedCfvs = $conn->fetchOne('
+    SELECT COUNT(*) FROM custom_field_values cfv
+    JOIN custom_fields cf ON cf.id = cfv.customfieldid
+    WHERE cf.typecomposantid IS NULL AND cf.typepieceid IS NULL AND cf.typeproductid IS NULL
+');
+echo sprintf("2. Orphaned CF values: %d %s\n", $orphanedCfvs, 0 == $orphanedCfvs ? '[OK]' : '[PROBLEM]');
+
+// 3. Duplicate CFValues (same entity + same field name)
+$duplicatePieces = $conn->fetchOne("
+    SELECT COUNT(*) FROM (
+        SELECT cfv.pieceid, cf.name, COUNT(*) as cnt
+        FROM custom_field_values cfv
+        JOIN custom_fields cf ON cf.id = cfv.customfieldid
+        WHERE cfv.pieceid IS NOT NULL
+        GROUP BY cfv.pieceid, cf.name
+        HAVING COUNT(*) > 1
+    ) t
+");
+$duplicateComposants = $conn->fetchOne("
+    SELECT COUNT(*) FROM (
+        SELECT cfv.composantid, cf.name, COUNT(*) as cnt
+        FROM custom_field_values cfv
+        JOIN custom_fields cf ON cf.id = cfv.customfieldid
+        WHERE cfv.composantid IS NOT NULL
+        GROUP BY cfv.composantid, cf.name
+        HAVING COUNT(*) > 1
+    ) t
+");
+$totalDuplicates = $duplicatePieces + $duplicateComposants;
+echo sprintf("3. Duplicate CF values: %d %s\n", $totalDuplicates, 0 == $totalDuplicates ? '[OK]' : '[PROBLEM]');
+
+// 4. Spot check known pieces
+echo "\n--- Spot checks ---\n";
+
+$checks = [
+    ['Arbre du palier pied E1', 'cl3d978dd4b071daff8fb185f7', 'pieceid', 'diamètre', '50'],
+    ['Arbre du palier tête E1', 'cmkr0qjw5004s1eq6pen63x7j', 'pieceid', 'diamètre', '70'],
+    ['Cage écureuil pied E1', 'clbe710810fd7ccd09811957b3', 'composantid', 'Diamètre', ''],
+];
+
+foreach ($checks as [$name, $id, $fk, $fieldName, $expectedValue]) {
+    $row = $conn->fetchAssociative(
+        "SELECT cfv.value FROM custom_field_values cfv JOIN custom_fields cf ON cf.id = cfv.customfieldid WHERE cfv.{$fk} = ? AND cf.name = ?",
+        [$id, $fieldName]
+    );
+    $value = $row ? $row['value'] : '(NOT FOUND)';
+    $ok = '' === $expectedValue ? ('' !== $value && null !== $value) : ($value === $expectedValue);
+    echo sprintf("  %s → %s = '%s' %s\n", $name, $fieldName, $value, $ok ? '[OK]' : '[CHECK]');
+}
+
+// 5. Summary of empty vs filled values
+echo "\n--- Value fill rates ---\n";
+$stats = $conn->fetchAllAssociative("
+    SELECT
+        CASE WHEN cfv.pieceid IS NOT NULL THEN 'piece'
+             WHEN cfv.composantid IS NOT NULL THEN 'composant'
+             WHEN cfv.productid IS NOT NULL THEN 'product'
+             ELSE 'unknown' END as entity_type,
+        COUNT(*) as total,
+        COUNT(*) FILTER (WHERE cfv.value != '' AND cfv.value IS NOT NULL) as filled,
+        COUNT(*) FILTER (WHERE cfv.value = '' OR cfv.value IS NULL) as empty
+    FROM custom_field_values cfv
+    GROUP BY entity_type
+    ORDER BY entity_type
+");
+foreach ($stats as $s) {
+    $pct = $s['total'] > 0 ? round(100 * $s['filled'] / $s['total']) : 0;
+    echo sprintf("  %s: %d/%d filled (%d%%)\n", $s['entity_type'], $s['filled'], $s['total'], $pct);
+}
+
+echo "\n=== DONE ===\n";