enhance: bump knowhere to d85f7080

[foxspy]

Move the knowhere pin from 6a3b7df1 to main at d85f7080 (zilliztech/knowhere#1780), which bumps the cardinal references to v3.0.5 (v2) and v2.5.110 (v1).

The stale comment above the pin is updated to describe the new one.

Heads-up for reviewers: this range also brings in zilliztech/knowhere#1673 "support nullable external id mapping", which the previous pin deliberately excluded.

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
To complete the pull request process, please assign czs007 after the PR has been reviewed.
You can assign the PR to them by writing /assign @czs007 in a comment when ready.

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• internal/core/OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[sre-ci-robot]

[ci-v2-notice]
Notice: New ci-v2 system is enabled for this PR.

To rerun ci-v2 checks, comment with:

• /ci-rerun-code-check // for ci-v2/code-check
• /ci-rerun-code-check-macos // for Code Checker MacOS (GitHub Actions)
• /ci-rerun-build // for ci-v2/build
• /ci-rerun-build-all // for ci-v2/build-all (multi-arch builds)
• /ci-rerun-buildenv // for ci-v2/build-env (build milvus-env builder images; update .env after the new tag is ready)
• /ci-rerun-ut-integration // for ci-v2/ut-integration, will rerun ci-v2/build
• /ci-rerun-ut-go // for ci-v2/ut-go, will rerun ci-v2/build
• /ci-rerun-ut-cpp // for ci-v2/ut-cpp
• /ci-rerun-ut // for all ci-v2/ut-integration, ci-v2/ut-go, ci-v2/ut-cpp, will rerun ci-v2/build
• /ci-rerun-e2e-default // for ci-v2/e2e-default
• /ci-rerun-e2e-amd // for ci-v2/e2e-amd (e2e pool dispatcher)
• /ci-rerun-e2e-dist-wp // for ci-v2/e2e-dist-wp (Tencent distributed woodpecker-service boundary)
• /ci-rerun-build-ut-cov // for ci-v2/build-ut-cov (build + unit tests in one pipeline)
• /ci-rerun-gosdk // for ci-v2/go-sdk (Go SDK E2E tests, ARM)
• /ci-rerun-gosdk-std // for ci-v2/go-sdk-std (Go SDK E2E, standalone)
• /ci-rerun-gosdk-dist-wp // for ci-v2/go-sdk-dist-wp (Go SDK E2E, distributed + Woodpecker service)

If you have any questions or requests, please contact @zhikunyao.

[sre-ci-robot]

❌ CI Loop Results e70c914

Stage	Result	Duration	Tests
✅ Build	SUCCESS	17.8min	-
✅ Code-Check	SUCCESS	11.4min	-
✅ UT-Integration	SUCCESS	26.6min	-
✅ UT-GO	SUCCESS	23.5min	-
❌ UT-CPP-Cov	FAILURE	64.9min	8692 total, 8691 passed, 1 failed

Total: 87min | Pipeline | Artifacts

Failed Test Logs:

• UT-CPP-Cov: view log

[foxspy]

Closing: superseded, and merging it now would be a regression.

master and 3.0 both already pin knowhere d7cfd888, not the 6a3b7df1 this PR was written against. The pin moved twice since:

• 08-19 77ebd82e0e (enhance: move nullable vector mapping into index layer #50524, move nullable vector mapping into index layer) → d85f7080
• 08-22 57ea5fff5e (fix: update Knowhere for stable IndexNode ABI #52754, stable IndexNode ABI) → d7cfd888

So this PR's intent — get onto a knowhere revision carrying cardinal v3.0.5 / v2.5.110 — is already satisfied, and d85f7080 is now 3 commits behind the current pin. Merging would drop:

• d7cfd888 fix: keep IndexNode ABI stable across Cardinal builds (fix: keep IndexNode ABI stable across Cardinal builds zilliztech/knowhere#1786)
• 8c864b5f fix: update SVS SQ8 storage enum (fix: update SVS SQ8 storage enum after Faiss 1.15.0+ upgrade zilliztech/knowhere#1784)
• 03b845e3 enhance: skip fully filtered windows in sindi sparse search (enhance: skip fully filtered windows in sindi sparse search zilliztech/knowhere#1782)

The concern in the original description — that this bump re-introduces zilliztech/knowhere#1673 — is also moot: 7cc9d4be is already an ancestor of the current pin (0 behind / 15 ahead).

If a tag-form pin is still wanted for the 3.0 branch, it should be a fresh tag cut at d7cfd888 or later, not v3.0.8 (= d85f7080).