Feat: Add industry-related search keyword generation function (#9156)

### What problem does this PR solve?
Add industry-related search keyword generation function
- When generating search keywords, support for specific industries has
been added
- If the "industry" parameter is provided, industry-specific
restrictions will be added to the prompt
- This change can help users generate more precise search keywords
within specific industries

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

api/apps/sdk/session.py

@@ -737,6 +737,7 @@ def related_questions(tenant_id):
     if not req.get("question"):
         return get_error_data_result("`question` is required.")
     question = req["question"]
+    industry = req.get("industry", "")
     chat_mdl = LLMBundle(tenant_id, LLMType.CHAT)
     prompt = """
 Objective: To generate search terms related to the user's search keywords, helping users find more valuable information.
@@ -746,7 +747,10 @@ Instructions:
  - Use common, general terms as much as possible, avoiding obscure words or technical jargon.
  - Keep the term length between 2-4 words, concise and clear.
  - DO NOT translate, use the language of the original keywords.
-
+"""
+    if industry:
+        prompt += f" - Ensure all search terms are relevant to the industry: {industry}.\n"
+    prompt += """
 ### Example:
 Keywords: Chinese football
 Related search terms: