bug(sdk): parseTeamMarkdown leaks auxiliary tables into the roster #2079

Defect

parseTeamMarkdown() treats every pipe-delimited row after any Name-headed table as a roster row, including tables in later, unrelated Markdown sections. squad health imports that parser and reports its result as the valid-member count.

Reproduction

Given this structure:

## Members
| Name | Role |
|---|---|
| Alpha | Developer |

## References
| Existing Agent | Reused By |
|---|---|
| Legacy Agent | Alpha |

parseTeamMarkdown() returns alpha, existing-agent, and legacy-agent rather than only alpha.

The installed @bradygaster/squad-cli 0.13.1 reproduces this against philips-internal/org-chart-automation-JavaScript's current .squad/team.md: it returns 21 entries — squad, 12 actual members, amittai-shapira, existing-agent, and six reuse-table rows. squad health consequently reports team.md is valid (21 members).

Cause

packages/squad-sdk/src/config/markdown-migration.ts's parseTeamTable() scans the entire document. It sets headerCols whenever it sees a Name column, but does not limit parsing to ## Members/## Roster or reset its mapping upon a new Markdown section. A later table without a Name header therefore inherits the prior mapping; its header itself is also parsed as data.

The comment that says it resets "for each roster table" is inaccurate: it only resets on another Name-headed table, regardless of section.

Expected

Only the declared roster table should produce ParsedAgent values. Tables under ## Human Members, ## Existing Project Agents Reused, or arbitrary later sections must not contribute members. Add regression coverage that keeps both a Name-headed non-roster table and a non-Name auxiliary table out of the parsed roster, and make squad health report the actual roster count.

Downstream

This blocks https://github.com/philips-internal/org-chart-automation-JavaScript/issues/1007 from providing a truthful squad health roster count. A local Markdown/HTML workaround can hide the symptom, but cannot repair the globally installed SDK/CLI parser behavior.