Move test db connection to env

[fadrian06]

What kind of change does this PR introduce? (pls check at least one)

• Bugfix
• Feature
• Code style update
• Refactor
• Build-related changes
• Other, please describe below

Description

This PR addresses an issue I ran into while running tests to continue contributing to the project, caused by hardcoded database connection literals in the tests. These literals are now refactored to pull from .env.example.php with customization possible via .env.php. Before all tests could pass, I spotted a syntax problem in the Db class: the docblock for the first whereJson method was missing the starting /, and that method along with its variants appeared twice. Removing the duplicates fixed the issue, and now all tests pass locally. I’m hoping this PR gets merged soon so I can keep contributing, particularly by helping resolve issues, enhancing sqlite support, and fixing problems when using the database without the Leaf core.

Does this PR introduce a breaking change? (check one)

• Yes
• No

[Copilot]

Pull request overview

This PR refactors MySQL tests to use environment-based DB connection settings (via .env.example.php with optional .env.php overrides) and removes a duplicated whereJson/JSON helper method block from src/Db.php.

Changes:

• Replace hardcoded MySQL connection literals in tests with values read from $_ENV.
• Add .env.example.php and ignore .env.php to allow local test configuration without committing secrets.
• Remove duplicated JSON-where methods in src/Db.php.

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
tests/mysql/leaf-builder.test.php	Switches to env-based DB connection, but currently lacks its own env/fixture setup.
tests/mysql/connect.test.php	Loads env config for tests and updates connection assertion to use connectSync.
src/Db.php	Removes duplicate JSON-where methods; remaining docblock needs correction.
.gitignore	Ignores .env.php to prevent committing local secrets.
.env.example.php	Introduces an env template for DB config (currently contains what appear to be real credentials).

Comments suppressed due to low confidence (1)

src/Db.php:362

• The docblock on whereJson says "Fetch current query with all related data", but the method actually adds a JSON where clause. This mismatch is confusing for IDEs and generated docs; update the summary to reflect the method’s behavior.

    /**
     * Fetch current query with all related data
     *
     * @param string $column The JSON column
     * @param string $jsonKey The key within the JSON structure

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 4 out of 5 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 4 out of 5 changed files in this pull request and generated 6 comments.

[Copilot]

Pull request overview

Copilot reviewed 4 out of 5 changed files in this pull request and generated 7 comments.

[fadrian06]

Copilot stresses me out; I’m waiting for the opinion of real intelligence.

P.S. The tests need a more thorough refactoring so that if they’re going to depend on order, it’s clearly defined.