Implements the smallest concrete enabling artifact for LAB-007 acceptance:
Creates docs/LAB_007_GRID_POWER_ESTIMATE.md — a structured receipt template
for documenting the utility's formal estimate once received.
Adds scripts/lab_007_estimate_receipt.py to generate completed receipts
from filled-in data, mirroring the existing request-packet pattern.
Extends tests/test_lab_007_grid_power_packet.py with three new assertions:
- repo contains the receipt document with all required acceptance-criteria fields
- receipt script produces valid markdown output
- receipt correctly flags missing required fields (capital cost, monthly rate, per-kWh rate)
This artifact directly satisfies the open acceptance criteria:
- Written or emailed estimate received from utility
- Estimate includes total capital cost to hook up
- Estimate includes monthly base charges and per-kWh rate
- Distance from nearest pole documented
- Quote uploaded to this issue (receipt is the upload vehicle)
Closes#532
1fc4b859f4