fix(cli): index <path> never rebuilds an ancestor instead

[danusha2345]

Fixes #1524.

Problem

codegraph index <path> resolved an uninitialized <path> upward to the nearest initialized parent and rebuilt THAT under a normal "Done", never saying which project it actually indexed. From a monorepo package that meant re-indexing the whole container; from a fresh clone beside a stale ancestor, rebuilding the wrong graph.

Change

An explicit path names the project to rebuild — it is not a hint to go looking for one. When <path> has no index the command exits 1, names the ancestor it would have picked, and says how to index <path> on its own. A bare codegraph index (cwd) still resolves upward exactly as before, and so do the query commands, whose upward walk is the right behaviour.

Verification

New __tests__/cli-index-explicit-path.test.ts against the built binary: the parent's DB is untouched and no .codegraph appears in the child; an initialized explicit path and a bare index from a subdirectory both still rebuild. Full suite green.

🤖 Generated with Claude Code

[danusha2345]

Merged current main (3adf067, post-#1770) into this branch: head 3801fb6. The only conflict was the CHANGELOG entry; no source conflict. tsc clean, the branch's tests pass.

[danusha2345]

Merged current main (43271f3) into this branch: head 9cd7c03. The only conflict was the CHANGELOG entry; no source conflict. tsc clean, the branch's tests pass.

[danusha2345]

Merged current main (85550eb) into this branch: head 60f98a7. The only conflict was the CHANGELOG entry; no source conflict. tsc clean, the branch's tests pass.

[danusha2345]

Merged current main (8733c28) into this branch: head 7c31ecd. The only conflict was the CHANGELOG entry; no source conflict. tsc clean, the branch's tests pass.

[danusha2345]

Merged current main (8c04734) into this branch: head 3a5c8cb. The only conflict was the CHANGELOG entry; no source conflict. tsc clean, the branch's tests pass.

[danusha2345]

Merged current main (ee83636) into this branch: head db72160. The only conflict was the CHANGELOG entry; no source conflict. tsc clean, the branch's tests pass.

[danusha2345]

Merged current main (e720f6c) into this branch: head 7f71d6a. The only conflict was the CHANGELOG entry; no source conflict. tsc clean, the branch's tests pass.

[danusha2345]

Merged current main (de5adba) into this branch: head 6725624. The only conflict was the CHANGELOG entry; no source conflict. tsc clean, the branch's tests pass.

[danusha2345]

Merged current main (cece072) into this branch: head c7dbef0. The only conflict was the CHANGELOG entry; no source conflict. tsc clean, the branch's tests pass.

[danusha2345]

Merged current main (040ba38) into this branch: head a6ea622. The only conflict was the CHANGELOG entry; no source conflict. tsc clean, the branch's tests pass.

[danusha2345]

Merged current main (374b3b4) into this branch: head 4d3c6b0. The only conflict was the CHANGELOG entry; no source conflict. tsc clean, the branch's tests pass.

[colbymchenry]

Superseded by Forge PR #1797, which cherry-picks this fix (6674d970 → 327ea5aa) onto current main with CHANGELOG resolved and Linux fail→pass verified. Closing as superseded — thank you @danusha2345.

[colbymchenry]

Superseded by #1797