fix(mcp): use load_dotenv(override=True) to prioritize .env over shell vars

[dirkenglund]

Summary

• Fixed MCP server connecting to wrong Neo4j database when shell has conflicting NEO4J_URI

Problem

When the shell environment has NEO4J_URI set (e.g., from .zshrc), the default load_dotenv() behavior doesn't override it. This causes the MCP server to connect to the wrong database.

Solution

Added override=True to load_dotenv() calls, ensuring the .env file credentials take precedence over any pre-existing shell environment variables.

Test plan

• Verified MCP server connects to correct database specified in .env
• Tested with conflicting NEO4J_URI in shell environment

🤖 Generated with Claude Code

[danielchalef]

Thank you for your submission, we really appreciate it. Like many open-source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution. You can sign the CLA by just posting a Pull Request Comment same as the below format.

---

I have read the CLA Document and I hereby sign the CLA

---

_{You can retrigger this bot by commenting recheck in this Pull Request. Posted by the CLA Assistant Lite bot.}