Moved BQL-BALANCE-QUERIES.md from beancounter project to Castle docs/ folder.
Updated all code references from misc-docs/ to docs/ for proper documentation
location alongside implementation.
The document contains comprehensive BQL investigation results showing that
BQL is not feasible for Castle's current ledger format where SATS are stored
in posting metadata rather than position amounts.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
