perf(spec-parser): use summary for converation starter and truncate it with 50 chars

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 87.83%. Comparing base (8fbe2bc) to head (80b41d4). Report is 2 commits behind head on dev.

Additional details and impacted files

[](https://app.codecov.io/gh/OfficeDev/TeamsFx/pull/11474?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=OfficeDev) ```diff @@ Coverage Diff @@ ## dev #11474 +/- ## ======================================== Coverage 87.83% 87.83% ======================================== Files 496 496 Lines 29732 29735 +3 Branches 5944 5792 -152 ======================================== + Hits 26114 26117 +3 Misses 1778 1778 Partials 1840 1840 ``` | [Files](https://app.codecov.io/gh/OfficeDev/TeamsFx/pull/11474?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=OfficeDev) | Coverage Δ | | |---|---|---| | [packages/spec-parser/src/constants.ts](https://app.codecov.io/gh/OfficeDev/TeamsFx/pull/11474?src=pr&el=tree&filepath=packages%2Fspec-parser%2Fsrc%2Fconstants.ts&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=OfficeDev#diff-cGFja2FnZXMvc3BlYy1wYXJzZXIvc3JjL2NvbnN0YW50cy50cw==) | `100.00% <100.00%> (ø)` | | | [packages/spec-parser/src/manifestUpdater.ts](https://app.codecov.io/gh/OfficeDev/TeamsFx/pull/11474?src=pr&el=tree&filepath=packages%2Fspec-parser%2Fsrc%2FmanifestUpdater.ts&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=OfficeDev#diff-cGFja2FnZXMvc3BlYy1wYXJzZXIvc3JjL21hbmlmZXN0VXBkYXRlci50cw==) | `93.17% <100.00%> (+0.06%)` | :arrow_up: |