KB max batch size: apply insert limit globally

[ea-rus]

Description

Continue of #11463

Changes:

• Check insert limit globally: SQL, rest
• Use limit from env var: KB_MAX_INSERT_BATCH_SIZE
  • default value is 50k

Fixes https://linear.app/mindsdb/issue/FQE-1776/apply-knowledge-base-upload-limits-consistently

Type of change

• 🐛 Bug fix (non-breaking change which fixes an issue)

Verification Process

To ensure the changes are working as expected:

• Test Location: Specify the URL or path for testing.
• Verification Steps: Outline the steps or queries needed to validate the change. Include any data, configurations, or actions required to reproduce or see the new functionality.

Additional Media:

• I have attached a brief loom video or screenshots showcasing the new functionality or change.

Checklist:

• My code follows the style guidelines(PEP 8) of MindsDB.
• I have appropriately commented on my code, especially in complex areas.
• Necessary documentation updates are either made or tracked in issues.
• Relevant unit and integration tests are updated or added.

[entelligence-ai-pr-reviews]

Entelligence AI Vulnerability Scanner

Status: No security vulnerabilities found

Your code passed our comprehensive security analysis.

Analyzed 2 files in total

[entelligence-ai-pr-reviews]

Review Summary

🏷️ Draft Comments (1)

Skipped posting 1 draft comments that were valid but scored below your review threshold (>=13/15). Feel free to update them here.

mindsdb/interfaces/agents/constants.py (1)

211-211: os.getenv("KB_MAX_INSERT_BATCH_SIZE", 50_000) uses an integer as the default, but os.getenv expects a string or None, which can cause a TypeError at runtime if the environment variable is not set.

📊 Impact Scores:

• Production Impact: 4/5
• Fix Specificity: 5/5
• Urgency Impact: 3/5
• Total Score: 12/15

🤖 AI Agent Prompt (Copy & Paste Ready):

In mindsdb/interfaces/agents/constants.py, line 211, the code uses `os.getenv("KB_MAX_INSERT_BATCH_SIZE", 50_000)` with an integer as the default value. This can cause a TypeError at runtime because os.getenv expects a string or None as the default. Change the default value to a string: `os.getenv("KB_MAX_INSERT_BATCH_SIZE", "50000")`.

---

[StpMax]

It would be better to process env var in one place - in the config.py