harden information getter services and optimize user msg

src/Config/PromptBuilderConfig.php

@@ -310,6 +310,50 @@ final class PromptBuilderConfig
         ]);
     }
 
+    public function getFallbackEscalationSectionLabel(): string
+    {
+        return $this->getString('sections.fallback_escalation_label', 'FALLBACK AND ESCALATION RULES');
+    }
+
+    public function getFallbackEscalationStateLineTemplate(): string
+    {
+        return $this->getString('fallback_escalation.state_line_template', '- Internal confidence state: {state}.');
+    }
+
+    /**
+     * @return string[]
+     */
+    public function getFallbackEscalationBaseRules(): array
+    {
+        return $this->getStringList('fallback_escalation.base_rules', [
+            '- Prefer transparent uncertainty over a confident but unsupported answer.',
+            '- Never present missing or weak evidence as proof that a product, value, accessory, or suitability does not exist.',
+            '- A negative answer is allowed only when the provided sources explicitly support that negative finding for the asked scope.',
+            '- If several products, parameters, or accessories could match, ask one focused clarification question instead of guessing.',
+            '- For risky or binding product selection, state that sales or support should verify the application before a final selection.',
+        ]);
+    }
+
+    /**
+     * @return string[]
+     */
+    public function getFallbackEscalationStateRules(string $state): array
+    {
+        return $this->getStringList('fallback_escalation.states.' . $state, []);
+    }
+
+    /**
+     * @return string[]
+     */
+    public function getFallbackEscalationWithoutShopCheckRules(): array
+    {
+        return $this->getStringList('fallback_escalation.without_shop_check_rules', [
+            '- If the question is product-related and no live shop check was performed in this run, do not make a portfolio-wide negative statement such as "there is no product".',
+            '- Phrase missing evidence narrowly, for example: "Im RAG-Wissen finde ich dazu keine belastbare Information."',
+            '- If useful, say that a shop search can be used to look for matching products, but do not claim shop results were checked unless they are present in the prompt.',
+        ]);
+    }
+
     public function getResponseFormatSectionLabel(): string
     {
         return $this->getString('sections.response_format_label', 'RESPONSE FORMAT RULES');