fix(dist-git): fix render staging, import-commit seeding, and commit …

[dmcilvaney]

…parsing

• Use project WorkDir for render staging instead of /tmp to avoid filling tmpfs on large batch renders with synthetic git history.
• Seed import-commit on first update so synthetic history walks have a bounded starting point instead of traversing entire repo histories.
• Fix TrimRight -> Trim in commit metadata parsing to handle leading newlines that caused hash parse failures.

[Copilot]

Pull request overview

This PR fixes performance and correctness issues in dist-git synthetic history generation and commit metadata parsing, and adjusts component render staging to use the project work directory to avoid exhausting /tmp/tmpfs during large batch renders.

Changes:

• Use project WorkDir for render staging instead of the OS temp dir.
• Seed import-commit on initial update for upstream components to bound synthetic history walks.
• Fix git log metadata parsing by trimming leading newlines as well as trailing newlines.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
internal/app/azldev/core/sources/synthistory.go	Adjust commit metadata block trimming to handle leading newlines and avoid parse failures.
internal/app/azldev/cmds/component/update.go	Seed import-commit for upstream components to bound synthetic history traversal.
internal/app/azldev/cmds/component/render.go	Create render staging directories under the project work dir to avoid filling /tmp.