fix: disable langchain4j OpenAI integration in test profile and add default placeholder for API key

Signed-off-by: Matheus Oliveira <matheus.6148@gmail.com>

Author: omatheusmesmo

timeless-api/src/main/resources/application.properties

@@ -19,8 +19,8 @@ quarkus.hibernate-orm.schema-management.strategy=update
 %dev.quarkus.hibernate-orm.dev-ui.allow-hql=true
 
 # ai
-quarkus.langchain4j.openai.api-key=${OPENAI_API_KEY}
-quarkus.langchain4j.openai.gpt-4-turbo.api-key=${OPENAI_API_KEY}
+quarkus.langchain4j.openai.api-key=${OPENAI_API_KEY:unused}
+quarkus.langchain4j.openai.gpt-4-turbo.api-key=${OPENAI_API_KEY:unused}
 
 # quinoa (frontend)
 quarkus.quinoa.enable-spa-routing=true
@@ -50,3 +50,5 @@ smallrye.jwt.sign.key=${JWT_PRIVATE_KEY}
 %quarkus.test.arg-line=--add-opens java.base/java.lang=ALL-UNNAMED
 
 %test.quarkus.scheduler.enabled=false
+
+%test.quarkus.langchain4j.openai.enable-integration=false