ExecuteSpec: codemap regeneration for navneetprabhakar/executor v1

[navneetprabhakar]

Auto-generated codemap update from ExecuteSpec.

Triggered by: project architecture regen.
Generated from SHA: 441e51b

What happens after you merge this?

• Merging is optional. This PR refreshes .executespec/arch/codemap.md so the cached arch matches the latest source. ExecuteSpec keeps a DB-side copy regardless — the file in your repo is the customer-facing artefact.
• No empty-PR cycle. When you do merge, the next analyse will check whether the codemap content has actually changed before opening another PR. If the default-branch HEAD bumped but the codemap is byte-identical, the writer skips the PR entirely.
• Skip the PR step entirely. If you'd rather these regenerations write straight to the default branch instead of through a PR, ask a project admin to flip this repo's executespec_pr_mode to DIRECT_PUSH.