feat(automation): add isolated job delivery mode

src/config/schema.ts

@@ -255,7 +255,11 @@ const gtasksSchema = z.object({
   token_file: z.string().default('~/.config/flynn/gtasks-token.json'),
 }).optional();
 
+const automationDeliveryModeSchema = z.enum(['shared_session', 'isolated_job']);
+
 const automationSchema = z.object({
+  /** Session strategy for automation-triggered runs (cron/webhooks/gmail). */
+  delivery_mode: automationDeliveryModeSchema.default('shared_session'),
   cron: z.array(cronJobSchema).default([]),
   webhooks: z.array(webhookSchema).default([]),
   gmail: gmailSchema,
@@ -593,6 +597,7 @@ export type GcalConfig = z.infer<typeof gcalSchema>;
 export type GdocsConfig = z.infer<typeof gdocsSchema>;
 export type GdriveConfig = z.infer<typeof gdriveSchema>;
 export type GtasksConfig = z.infer<typeof gtasksSchema>;
+export type AutomationDeliveryMode = z.infer<typeof automationDeliveryModeSchema>;
 export type PairingCodeConfig = z.infer<typeof pairingSchema>;
 export type LogLevel = z.infer<typeof logLevelSchema>;
 export type AuditConfig = z.infer<typeof auditSchema>;