fix(captain): captain_unit_id em captain_assistants — fim do lookup quebrado

Captain::Assistant agora aponta direto pra Captain::Unit. Antes a relação
ia via CaptainInbox, mas isso quebrou quando re-apontamos as inboxes pros
Hermes — assistants captain_interno (Juliana, Bianca, Lara, Nina,
Valentina) ficaram SEM CaptainInbox associada e o lookup
unit_for(assistant) retornava nil.

Resultado: get_assistant_pricing(3) (Lara) caía no fallback de scenario
text. Construtor reportava "veio cenário/prompt, não tabela estruturada".

Migration adiciona captain_unit_id (FK opcional). Backfill explícito:
- 1 Juliana → unit 3 (Qnn01)
- 2 Bianca → unit 2 (PrimeAL)
- 3 Lara → unit 2 (PrimeAL — mesmo brand)
- 4 Nina → unit 5 (Express)
- 6 Valentina → unit 4 (Dolce Amore)
- 9 Lara.H → unit 2 (via parent_assistant_id=3)

Tools get_assistant_pricing_tool e save_agent_spec_tool atualizados pra
usar assistant.captain_unit primeiro (nova relação direta), com fallback
pro CaptainInbox se nulo (pra retrocompatibilidade).

Validado live: tool retorna grid markdown com Stilo/Alexa/Hidromassagem
em Seg-Qua + Qui-Dom corretamente.

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

db/migrate/20260502160000_add_captain_unit_id_to_captain_assistants.rb

@@ -0,0 +1,9 @@
+class AddCaptainUnitIdToCaptainAssistants < ActiveRecord::Migration[7.1]
+  def change
+    add_reference :captain_assistants,
+                  :captain_unit,
+                  foreign_key: { to_table: :captain_units, on_delete: :nullify },
+                  null: true,
+                  index: true
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.1].define(version: 2026_05_02_120100) do
+ActiveRecord::Schema[7.1].define(version: 2026_05_02_160000) do
   # These extensions should be enabled to support this database
   enable_extension "pg_stat_statements"
   enable_extension "pg_trgm"
@@ -342,7 +342,9 @@ ActiveRecord::Schema[7.1].define(version: 2026_05_02_120100) do
     t.string "hermes_subscription_secret"
     t.integer "hermes_port"
     t.bigint "parent_assistant_id"
+    t.bigint "captain_unit_id"
     t.index ["account_id"], name: "index_captain_assistants_on_account_id"
+    t.index ["captain_unit_id"], name: "index_captain_assistants_on_captain_unit_id"
     t.index ["engine"], name: "index_captain_assistants_on_engine"
     t.index ["hermes_port"], name: "idx_captain_assistants_hermes_port_unique", unique: true, where: "(hermes_port IS NOT NULL)"
     t.index ["parent_assistant_id"], name: "index_captain_assistants_on_parent_assistant_id"
@@ -2166,6 +2168,7 @@ ActiveRecord::Schema[7.1].define(version: 2026_05_02_120100) do
   add_foreign_key "active_storage_variant_records", "active_storage_blobs", column: "blob_id"
   add_foreign_key "captain_assets", "accounts"
   add_foreign_key "captain_assets", "captain_suites"
+  add_foreign_key "captain_assistants", "captain_units", on_delete: :nullify
   add_foreign_key "captain_brands", "accounts"
   add_foreign_key "captain_configurations", "accounts"
   add_foreign_key "captain_contact_memories", "accounts", on_delete: :cascade

enterprise/app/models/captain/assistant.rb

@@ -21,15 +21,21 @@
 #  created_at                 :datetime         not null
 #  updated_at                 :datetime         not null
 #  account_id                 :bigint           not null
+#  captain_unit_id            :bigint
 #  parent_assistant_id        :bigint
 #
 # Indexes
 #
 #  idx_captain_assistants_hermes_port_unique        (hermes_port) UNIQUE WHERE (hermes_port IS NOT NULL)
 #  index_captain_assistants_on_account_id           (account_id)
+#  index_captain_assistants_on_captain_unit_id      (captain_unit_id)
 #  index_captain_assistants_on_engine               (engine)
 #  index_captain_assistants_on_parent_assistant_id  (parent_assistant_id)
 #
+# Foreign Keys
+#
+#  fk_rails_...  (captain_unit_id => captain_units.id) ON DELETE => nullify
+#
 class Captain::Assistant < ApplicationRecord
   include Avatarable
   include Concerns::CaptainToolsHelpers
@@ -38,6 +44,7 @@ class Captain::Assistant < ApplicationRecord
   self.table_name = 'captain_assistants'
 
   belongs_to :account
+  belongs_to :captain_unit, class_name: 'Captain::Unit', optional: true
   has_many :documents, class_name: 'Captain::Document', dependent: :destroy_async
   has_many :responses, class_name: 'Captain::AssistantResponse', dependent: :destroy_async
   has_many :captain_inboxes,

enterprise/app/services/captain/mcp/tools/get_assistant_pricing_tool.rb

@@ -68,6 +68,8 @@ class Captain::Mcp::Tools::GetAssistantPricingTool < Captain::Mcp::Tools::BaseTo
   end
 
   def unit_for(assistant)
+    return assistant.captain_unit if assistant.captain_unit_id.present?
+
     ci = CaptainInbox.find_by(captain_assistant_id: assistant.id)
     return nil if ci.blank?
 

enterprise/app/services/captain/mcp/tools/save_agent_spec_tool.rb

@@ -132,6 +132,7 @@ class Captain::Mcp::Tools::SaveAgentSpecTool < Captain::Mcp::Tools::BaseTool
 
   def parent_unit_for(parent)
     return nil if parent.nil?
+    return parent.captain_unit if parent.captain_unit_id.present?
 
     ci = parent.captain_inboxes.first
     return nil if ci.nil?