#18998: fix(llm-task): fall back to dist/ path for runEmbeddedPiAgent import

## Summary Based on #18946 by @arosstale, with fixes for CI failure and review feedback: - Fixes copy-paste bug where the bundled-install fallback imported from `src/` (same as the dev path) instead of `dist/`, causing `runEmbeddedPiAgent` to fail in packaged installs where `src/` doesn't exist - **Adds `@ts-expect-error`** to suppress TS2307 for the `dist/` import path that only exists at runtime in packaged installs (this was causing the CI type-check failure) - **Adds `oxlint-disable` comments** for `as any` casts in the `dist/` block, matching the existing `src/` block style - **Captures the underlying import error** and attaches it via `Error({ cause })` so callers can see why each import attempt failed, rather than getting a generic "not available" message ## Test plan - [x] `tsgo --noEmit` passes (no TS2307 error) - [x] `oxfmt --check` passes - [x] `oxlint` passes (no `no-explicit-any` errors) Fixes #18846 Supersedes #18946 <!-- greptile_comment --> <h3>Greptile Summary</h3> Fixes a copy-paste bug in `loadRunEmbeddedPiAgent()` where the bundled-install fallback path was importing from `src/` (identical to the dev path) instead of `dist/`, causing `runEmbeddedPiAgent` to fail in packaged installs where `src/` doesn't exist. - Corrects the fallback import path from `../../../src/` to `../../../dist/` for packaged installs - Wraps the `dist/` import in a `try/catch` block (matching the `src/` block pattern) with `@ts-expect-error` to suppress TS2307 since the path only exists at runtime - Captures and attaches the underlying import error via `Error({ cause })` for better debugging - Import reorder is oxfmt auto-sorting (no logic change) <h3>Confidence Score: 5/5</h3> - This PR is safe to merge — it fixes a clear copy-paste bug with a minimal, well-structured change. - The change is small and targeted: it fixes an obvious copy-paste bug (both paths importing from src/ instead of src/ then dist/), follows the existing code patterns, and adds proper error handling. The import reorder is purely formatter-driven. No new logic complexity or risk introduced. - No files require special attention. _{Last reviewed commit: 55437c8} <!-- greptile_other_comments_section --> <!-- /greptile_comment -->