Add workflow-centric patient journey with financial gates.

Introduces a facility workflow engine as Care's primary configuration
object: onboarding now leads with a facility category (which modules to
enable) and a workflow template (how patients move + where money is
collected), including standard herbal hospital/clinic templates.

Templates materialize into care_facility_workflows/care_workflow_stages.
The engine tracks a visit's position via care_visit_stage_advances and,
with FinancialGateService, gates a stage's queue behind a cleared
FinancialObligation (paid/authorized/waived/deferred) for "before"
payment timing while leaving "after" (pay-at-exit) flows unblocked.
Gated behavior is opt-in behind the workflow_engine/financial_gates
rollout flags; legacy orgs keep current behavior.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Models/FacilityWorkflow.php

@@ -0,0 +1,69 @@
+<?php
+
+namespace App\Models;
+
+use App\Models\Concerns\BelongsToOwner;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Database\Eloquent\SoftDeletes;
+use Illuminate\Support\Str;
+
+class FacilityWorkflow extends Model
+{
+    use BelongsToOwner, SoftDeletes;
+
+    protected $table = 'care_facility_workflows';
+
+    protected $fillable = [
+        'uuid', 'owner_ref', 'organization_id', 'branch_id', 'name',
+        'template_key', 'category', 'is_active', 'settings',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'is_active' => 'boolean',
+            'settings' => 'array',
+        ];
+    }
+
+    protected static function booted(): void
+    {
+        static::creating(function (FacilityWorkflow $workflow) {
+            if (! $workflow->uuid) {
+                $workflow->uuid = (string) Str::uuid();
+            }
+        });
+    }
+
+    public function getRouteKeyName(): string
+    {
+        return 'uuid';
+    }
+
+    public function organization(): BelongsTo
+    {
+        return $this->belongsTo(Organization::class, 'organization_id');
+    }
+
+    public function branch(): BelongsTo
+    {
+        return $this->belongsTo(Branch::class, 'branch_id');
+    }
+
+    public function stages(): HasMany
+    {
+        return $this->hasMany(WorkflowStage::class, 'workflow_id')->orderBy('sort_order');
+    }
+
+    public function firstStage(): ?WorkflowStage
+    {
+        return $this->stages()->first();
+    }
+
+    public function stage(string $code): ?WorkflowStage
+    {
+        return $this->stages()->where('code', $code)->first();
+    }
+}