Missing feature handle stock halts and suspensions

Expected Behavior

Lean should handle cases of stock suspensions and halts correctly.

There are cases where the SEC intervenes in the market to halt trading activity due to serious concerns about a company's assets, operations, or other financial information. e.g. Luckin Coffee Inc on 2020-04-07

In other cases, due to other reasons, The security halts the trading on a given date. e.g. Biogen on 2020-11-06

Actual Behavior

Lean complains there is missing data when, in reality, there was no data at all for that period.

Potential Solution

Implement the suspension in the map files.

Reproducing the Problem

System Information

Checklist

• I have completely filled out this template
• I have confirmed that this issue exists on the current master branch
• I have confirmed that this is not a duplicate issue by searching issues

• I have provided detailed steps to reproduce the issue

The issue identifies map files as the likely area but names no specific file or test. Start by locating the map files and reviewing how missing data is currently handled for stock history. Done means halted or suspended periods are represented without Lean reporting missing data incorrectly.