fix(boot): stop creating stub users table on metadata.create_all

Base.metadata.create_all(checkfirst=True) was creating a `users(id integer)`
table from the foreign-key stub model defined in src/models/models.py. The
users table is owned by evo-auth-service, and when the processor boots
first on a fresh install it claims the table before auth gets a chance
to run its InitSchema migration — which then silently skips its own
create_table :users because if_not_exists: true matches the stub.

Net effect: auth runs without the real users schema (no mfa_method,
no encrypted_password, no oauth_access_tokens, etc.) and every login
returns 500, which cascades as 503 in the CRM.

Fix: filter `users` (and any future cross-service tables) out of the
create_all() call. The Python `User` model stays for ForeignKey() typing,
but no DDL is emitted for it. Auth remains the sole creator of the
canonical users table.

Incident: multimport.ind.br fresh install on 2026-05-27 — every fresh
deploy of rc4 hits this because processor and auth race on first boot.

Author: DavidsonGomes

src/main.py

@@ -141,8 +141,16 @@
     "POSTGRES_CONNECTION_STRING", "postgresql://postgres:root@localhost:5432/evo_ai"
 )
 
-# Create database tables
-Base.metadata.create_all(bind=engine, checkfirst=True)
+# Create database tables — exclude tables owned by other services (auth/CRM)
+# The `users` table is owned by evo-auth-service. Creating it here as a stub
+# (id integer) makes auth's InitSchema skip the real creation via if_not_exists,
+# permanently breaking authentication. See: incident multimport/2026-05-27.
+_owned_by_other_services = {"users"}
+_tables_to_create = [
+    table for name, table in Base.metadata.tables.items()
+    if name not in _owned_by_other_services
+]
+Base.metadata.create_all(bind=engine, tables=_tables_to_create, checkfirst=True)
 
 API_PREFIX = "/api/v1"