ERPClaw Stock Ledger Engine (erpclaw_lib/stock_posting.py)

Implements Stock Ledger Entry (SLE) operations for ERPClaw, including validation, insertion, reversal, balance calculation, and GL generation. Supports FIFO and moving-average valuation.

# Source: https://github.com/LeoYeAI/openclaw-master-skills | License: MIT | Copyright 2026 MyClaw.ai (LeoYeAI)
# Provided via justclaw.it.com; keep this notice with the code.
"""Stock Ledger Entry (SLE) engine for ERPClaw.

All stock_ledger_entry writes go through this module. This is the ONLY code
that writes to the stock_ledger_entry table. Critical design invariant.

Key functions:
- validate_stock_entries(): Validate SLE entries before insertion
- insert_sle_entries(): Validate + insert + compute running balance
- reverse_sle_entries(): Cancel by creating negative-qty mirror entries
- get_stock_balance(): Current qty & value for item/warehouse
- get_valuation_rate(): Current moving-average or FIFO valuation rate
- create_perpetual_inventory_gl(): Generate GL entries for stock movement

... (truncated -- full source via MCP)