fix(db): declare onDelete on required FKs that had none

Eight required (nullable:false) FKs had no referential action. Set per the
codebase's existing pattern: CASCADE for owned relations (doctor_insurances,
doctor_secretaries), RESTRICT for owner/reference FKs (Doctor/Clinic.user_id,
invited_by_id, subscription plan/period). Only the two CASCADE FKs need DDL —
RESTRICT is the MySQL default.

src/Clinic/Entity/Clinic.php

@@ -29,7 +29,7 @@ class Clinic
     private string $uuid;
 
     #[ORM\ManyToOne(targetEntity: User::class)]
-    #[ORM\JoinColumn(name: 'user_id', referencedColumnName: 'id', nullable: false)]
+    #[ORM\JoinColumn(name: 'user_id', referencedColumnName: 'id', nullable: false, onDelete: 'RESTRICT')]
     private User $user;
 
     #[ORM\Column(type: 'string', length: 255, nullable: true)]

src/ClinicInvitation/Entity/ClinicDoctorInvitation.php

@@ -34,7 +34,7 @@ class ClinicDoctorInvitation
     private Clinic $clinic;
 
     #[ORM\ManyToOne(targetEntity: User::class)]
-    #[ORM\JoinColumn(name: 'invited_by_id', referencedColumnName: 'id', nullable: false)]
+    #[ORM\JoinColumn(name: 'invited_by_id', referencedColumnName: 'id', nullable: false, onDelete: 'RESTRICT')]
     private User $invitedBy;
 
     #[ORM\ManyToOne(targetEntity: Doctor::class)]

src/Doctor/Entity/Doctor.php

@@ -32,7 +32,7 @@ class Doctor
     private string $uuid;
 
     #[ORM\OneToOne(targetEntity: User::class)]
-    #[ORM\JoinColumn(name: 'user_id', referencedColumnName: 'id', nullable: false)]
+    #[ORM\JoinColumn(name: 'user_id', referencedColumnName: 'id', nullable: false, onDelete: 'RESTRICT')]
     private User $user;
 
     #[ORM\Column(type: 'string', length: 255)]

src/Insurance/Entity/DoctorInsurance.php

@@ -22,7 +22,7 @@ class DoctorInsurance
     private Doctor $doctor;
 
     #[ORM\ManyToOne(targetEntity: Insurance::class)]
-    #[ORM\JoinColumn(name: 'insurance_id', referencedColumnName: 'id', nullable: false)]
+    #[ORM\JoinColumn(name: 'insurance_id', referencedColumnName: 'id', nullable: false, onDelete: 'CASCADE')]
     private Insurance $insurance;
 
     #[ORM\Column(type: 'integer', nullable: true)]

src/Secretary/Entity/DoctorSecretary.php

@@ -40,7 +40,7 @@ class DoctorSecretary
     private Doctor $doctor;
 
     #[ORM\ManyToOne(targetEntity: User::class)]
-    #[ORM\JoinColumn(name: 'secretary_id', referencedColumnName: 'id', nullable: false)]
+    #[ORM\JoinColumn(name: 'secretary_id', referencedColumnName: 'id', nullable: false, onDelete: 'CASCADE')]
     private User $secretary;
 
     #[ORM\Column(name: 'owner_type', type: 'string', length: 10, options: ['default' => 'doctor'])]

src/Subscription/Entity/ClinicSubscription.php

@@ -27,11 +27,11 @@ class ClinicSubscription
     private int $entityId;
 
     #[ORM\ManyToOne(targetEntity: SubscriptionPlan::class)]
-    #[ORM\JoinColumn(nullable: false)]
+    #[ORM\JoinColumn(nullable: false, onDelete: 'RESTRICT')]
     private SubscriptionPlan $plan;
 
     #[ORM\ManyToOne(targetEntity: SubscriptionPeriod::class)]
-    #[ORM\JoinColumn(nullable: false)]
+    #[ORM\JoinColumn(nullable: false, onDelete: 'RESTRICT')]
     private SubscriptionPeriod $period;
 
     #[ORM\ManyToOne(targetEntity: Payment::class)]

src/Subscription/Entity/SubscriptionPeriod.php

@@ -19,7 +19,7 @@ class SubscriptionPeriod
     private string $uuid;
 
     #[ORM\ManyToOne(targetEntity: SubscriptionPlan::class, inversedBy: 'periods')]
-    #[ORM\JoinColumn(nullable: false)]
+    #[ORM\JoinColumn(nullable: false, onDelete: 'RESTRICT')]
     private SubscriptionPlan $plan;
 
     #[ORM\Column(type: 'string', length: 50)]