Add anchor ordinal (Nth match) + anchor_locate_all

[JE-Chen]

Summary

Round-11, automation-core (locate lane). anchor_locate always returned the single nearest match — no way to pick "the 2nd row below the header" or enumerate every matching row.

Layers

• Headless core: extends je_auto_control/utils/anchor_locator/locator.py — ordinal param on anchor_locate (1-based; ordinal=1 = nearest, backward-compatible) and new anchor_locate_all returning every match sorted by distance. Shared pure _ranked helper (filter by relation, sort by distance). No PySide6.
• Facade: anchor_locate_all re-exported + __all__; anchor_locate gains ordinal.
• Executor: AC_anchor_locate ordinal param, new AC_anchor_locate_all → {count, matches}.
• MCP: ac_anchor_locate ordinal, new ac_anchor_locate_all.

Tests / docs

• test/unit_test/headless/test_anchor_ordinal_batch.py — 8 headless tests (ordinal Nth selection, out-of-range, locate-all sorted, empty-on-missing-anchor, relation-filters-before-ordinal + wiring + facade) via monkeypatched candidates. Existing anchor tests still pass (29 total).
• EN/Zh feature docs v124_features_doc.rst + toctrees; 3 WHATS_NEW entries.

Note: anchor commands have no Script Builder spec (Locator objects don't fit the flat field model — consistent with the base feature). Codacy may show action_required from its coverage gate only (issues=0).

[codacy-production]

Not up to standards ⛔

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud