feat(heartbeat): add process memory and backup health checks

src/config/schema.test.ts

@@ -962,6 +962,14 @@ describe('configSchema automation', () => {
     expect(result.automation.daily_briefing.prompt).toBe('Custom briefing prompt');
     expect(result.automation.daily_briefing.model_tier).toBe('fast');
   });
+
+  it('defaults heartbeat extended thresholds and checks', () => {
+    const result = configSchema.parse(baseConfig);
+    expect(result.automation.heartbeat.process_memory_threshold_mb).toBe(1500);
+    expect(result.automation.heartbeat.backup_failure_threshold).toBe(1);
+    expect(result.automation.heartbeat.checks).toContain('process_memory');
+    expect(result.automation.heartbeat.checks).toContain('backup');
+  });
 });
 
 describe('configSchema — intents', () => {

src/config/schema.ts

@@ -302,18 +302,20 @@ const gmailSchema = z.object({
   message: z.string().default('New email from {{from}}: {{subject}}\n\n{{snippet}}'),
 }).optional();
 
-const heartbeatCheckSchema = z.enum(['gateway', 'model', 'channels', 'memory', 'disk']);
+const heartbeatCheckSchema = z.enum(['gateway', 'model', 'channels', 'memory', 'disk', 'process_memory', 'backup']);
 
 const heartbeatSchema = z.object({
   enabled: z.boolean().default(false),
   interval: z.string().default('5m'),
-  checks: z.array(heartbeatCheckSchema).default(['gateway', 'model', 'channels', 'memory', 'disk']),
+  checks: z.array(heartbeatCheckSchema).default(['gateway', 'model', 'channels', 'memory', 'disk', 'process_memory', 'backup']),
   notify: z.object({
     channel: z.string().min(1),
     peer: z.string().min(1),
   }).optional(),
   failure_threshold: z.number().min(1).max(10).default(2),
   disk_threshold_mb: z.number().min(10).default(100),
+  process_memory_threshold_mb: z.number().min(64).default(1500),
+  backup_failure_threshold: z.number().min(1).max(10).default(1),
 }).default({});
 
 const gcalSchema = z.object({