feat(monitoring): generate daily tasks and optimize heartbeat writes

Adds a MonitoringDailyTaskWorker that materializes and dispatches
daily collect tasks from active subscription/desktop-client state,
with per-run atomic metrics and a Prometheus collector. Dashboard
and question-detail APIs now surface a platform_authorization_status
so the UI can distinguish no-desktop-client, no-authorized-platforms,
and authorized states; quota/access-state lookups resolve by request
workspace instead of tenant.

Hardens heartbeat: a desktop_client_primary_leases table gives
per-(tenant, workspace) sticky primary selection, read-mostly lease
resolution avoids a per-heartbeat transaction, and unchanged platform
access reports skip snapshot upserts outside a 10-minute refresh
window. Adds heartbeat primary/snapshot metrics exposed via
token-protected tenant-api /api/internal/metrics endpoints plus
Prometheus. Monitoring quota seed is removed from dev-seed since
daily plans now derive from desktop bindings, and the projection
uses the canonical six-platform catalog so platforms with zero
samples still render.

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

server/internal/shared/config/config_test.go

@@ -114,6 +114,58 @@ brand_library: {}
 	}
 }
 
+func TestLoadAppliesSchedulerHTTPDefaultsAndDisableSentinel(t *testing.T) {
+	defaultConfigPath := writeTestConfig(t, `
+scheduler: {}
+`)
+
+	cfg, err := Load(defaultConfigPath)
+	if err != nil {
+		t.Fatalf("Load() default error = %v", err)
+	}
+	if cfg.Scheduler.HTTPHost != "127.0.0.1" {
+		t.Fatalf("expected default scheduler http host 127.0.0.1, got %q", cfg.Scheduler.HTTPHost)
+	}
+	if cfg.Scheduler.HTTPPort != 8081 {
+		t.Fatalf("expected default scheduler http port 8081, got %d", cfg.Scheduler.HTTPPort)
+	}
+
+	disabledConfigPath := writeTestConfig(t, `
+scheduler:
+  http_port: -1
+`)
+
+	cfg, err = Load(disabledConfigPath)
+	if err != nil {
+		t.Fatalf("Load() disabled error = %v", err)
+	}
+	if cfg.Scheduler.HTTPPort != -1 {
+		t.Fatalf("expected scheduler http port -1 to disable server, got %d", cfg.Scheduler.HTTPPort)
+	}
+}
+
+func TestLoadPrefersEnvSchedulerMetricsSettings(t *testing.T) {
+	t.Setenv("SCHEDULER_HTTP_HOST", "0.0.0.0")
+	t.Setenv("SCHEDULER_INTERNAL_METRICS_TOKEN", "env-metrics-token")
+
+	configPath := writeTestConfig(t, `
+scheduler:
+  http_host: 127.0.0.1
+  internal_metrics_token: config-token
+`)
+
+	cfg, err := Load(configPath)
+	if err != nil {
+		t.Fatalf("Load() error = %v", err)
+	}
+	if cfg.Scheduler.HTTPHost != "0.0.0.0" {
+		t.Fatalf("expected env scheduler http host, got %q", cfg.Scheduler.HTTPHost)
+	}
+	if cfg.Scheduler.InternalMetricsToken != "env-metrics-token" {
+		t.Fatalf("expected env scheduler metrics token, got %q", cfg.Scheduler.InternalMetricsToken)
+	}
+}
+
 func TestLoadAppliesMembershipDefaults(t *testing.T) {
 	configPath := writeTestConfig(t, `
 membership: {}