Fix inaccurate RangeError explanation and invalid PayloadTooLargeError example in database.json

[Copilot]

Two incorrect entries in lib/database.json were providing misleading troubleshooting guidance.

Changes

• RangeError: Maximum call stack size exceeded — replaced inaccurate "infinite loop" explanation with accurate description of excessive recursion / deep call chains; expanded fixes to include base-case verification and call-chain depth checks
• PayloadTooLargeError example — replaced non-existent Express API express.limit() with the correct body-parser configuration:

// Before (invalid API)
app.use(express.limit('10mb'));

// After (correct)
app.use(express.json({ limit: '10mb' }));

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