feat(securite): encrypt SMTP passwords and NocoDB tokens at rest, log supplier mails

Encryption (server/crypto.ts):
- AES-256-GCM with a key derived from ENCRYPTION_KEY, falling back to
  SESSION_SECRET so existing deployments need no new configuration
- stored format enc:v1:<iv>:<tag>:<data>; encryption is idempotent and
  decryption passes legacy plaintext through unchanged, so nothing breaks
  mid-migration
- tampered data or a changed key raises an explicit error instead of
  returning garbage
- encrypt/decrypt is confined to the storage layer: group writes encrypt
  smtpPassword (decrypted only in emailService at connection time, never sent
  to the client), NocoDB config writes encrypt apiToken and reads decrypt it
  so the invoice verification and the admin page behave as before
- startup migration sweep encrypts secrets already stored in plaintext,
  idempotently; the active-config log line no longer prints the token

Mail history (supplier_mail_logs):
- every send attempt is recorded: delivery, store, supplier, recipient,
  subject, status sent/failed with error, message id, user id and name;
  a logging failure never fails the send itself
- GET /api/supplier-mail-logs restricted to the user's stores (admin may
  filter by store)
- on the reconciliation page the mail icon turns green once a request has
  been sent, with the date and sender in the tooltip; clicking again resends
- table created in init.sql, versioned migrations and the production
  startup migration, with delivery/group indexes

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FHdE9nEh8zHhQNGpCgrtYe

shared/schema.ts

@@ -985,6 +985,23 @@ export type WeatherSettings = typeof weatherSettings.$inferSelect;
 export type InsertWeatherSettings = z.infer<typeof insertWeatherSettingsSchema>;
 
 // Configuration Webhook BAP
+// Historique des mails de relance envoyés aux fournisseurs (rapprochement)
+export const supplierMailLogs = pgTable("supplier_mail_logs", {
+  id: serial("id").primaryKey(),
+  deliveryId: integer("delivery_id").notNull(),
+  groupId: integer("group_id").notNull(),
+  supplierId: integer("supplier_id"),
+  supplierName: varchar("supplier_name", { length: 255 }), // figé au moment de l'envoi
+  sentTo: varchar("sent_to", { length: 255 }).notNull(), // adresse destinataire
+  subject: text("subject"),
+  status: varchar("status", { length: 20 }).notNull(), // 'sent' | 'failed'
+  errorMessage: text("error_message"),
+  messageId: varchar("message_id", { length: 255 }),
+  sentBy: varchar("sent_by").notNull(), // id utilisateur
+  sentByName: varchar("sent_by_name", { length: 255 }), // nom lisible, figé
+  createdAt: timestamp("created_at").defaultNow(),
+});
+
 export const webhookBapConfig = pgTable("webhook_bap_config", {
   id: serial("id").primaryKey(),
   name: varchar("name", { length: 100 }).notNull().default("Configuration BAP"),
@@ -1005,3 +1022,11 @@ export const insertWebhookBapConfigSchema = createInsertSchema(webhookBapConfig)
 // Webhook BAP Types
 export type WebhookBapConfig = typeof webhookBapConfig.$inferSelect;
 export type InsertWebhookBapConfig = z.infer<typeof insertWebhookBapConfigSchema>;
+
+// Supplier mail logs
+export const insertSupplierMailLogSchema = createInsertSchema(supplierMailLogs).omit({
+  id: true,
+  createdAt: true,
+});
+export type SupplierMailLog = typeof supplierMailLogs.$inferSelect;
+export type InsertSupplierMailLog = z.infer<typeof insertSupplierMailLogSchema>;