🔒 Fix Tenant Isolation Failure in Webhooks and Interactions

[CaioIsCoding]

The fix addresses a critical tenant isolation failure where webhooks and user interactions were being associated with the first tenant in the database regardless of the actual sender or instance.

Key changes:

1. In app/api/v1/webhooks.py, the evolution_webhook now:
   • Identifies the tenant by joining with SocialAccount and filtering by the instance name from the payload.
   • Falls back to looking up the tenant by checking if the sender's remote_jid is in the admin_jids list.
   • Correctly associates newly created tenants with the sender and instance.
2. In app/services/interaction.py, handle_message now:
   • Joins ContentJob with Tenant and filters by Tenant.admin_jids.contains([remote_jid]).
   • This ensures that admins can only interact with jobs belonging to their own tenants.

These changes prevent unauthorized users from viewing or approving content from other tenants.

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PR created automatically by Jules for task 8567954283396659769 started by @CaioIsCoding

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