feat(world-map): migrate world_map chart to v1 chart data API

[rusackas]

SUMMARY

Tier 1 of #41714 (targets remove-legacy-viz-pipeline): migrate the World Map (world_map) off explore_json onto /api/v1/chart/data.

• New buildQuery.ts mirroring the legacy WorldMapViz.query_obj: entity → groupby, main metric plus the secondary bubble metric when distinct, metric-descending orderby under sort_by_metric.
• The country/m1/m2 reshape and the country-metadata join (cca3 code, lat/lng, display name) that viz.py performed against superset.examples.countries now happen in the frontend: the lookup table is bundled as a generated countries.ts (247 entries, name/cca2/cca3/cioc keys, case-insensitive, generated from the same backend source). Unmatched countries fall back to XXX exactly as before.
• Guarded rename: only rows carrying both the entity and metric labels are treated as v1 records, so pre-shaped legacy payloads (and entity columns literally named country) behave correctly.
• useLegacyApi: true removed (and the "Legacy" tag dropped).
• No DB migration: viz_type unchanged; legacy granularity_sqla/time_range handled by extractExtras (covered by test).

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

No visual change — same renderer, same data shape, different endpoint.

TESTING INSTRUCTIONS

• npm run test -- plugins/legacy-plugin-chart-world-map — 10 new Jest tests (query shape incl. secondary-metric dedup, country join by cca2/cca3/full name, case-insensitivity, XXX fallback, m2 mirroring); 21 total pass.
• Manual: open a saved World Map; network tab shows POST /api/v1/chart/data; choropleth colors, bubbles, tooltips and cross-filters identical.

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
• Introduces new feature or API
• Removes existing feature or API

🤖 Generated with Claude Code

[bito-code-review]

Bito Automatic Review Skipped - Branch Excluded

Bito didn't auto-review because the source or target branch is excluded from automatic reviews.
No action is needed if you didn't intend for the agent to review it. Otherwise, to manually trigger a review, type /review in a comment and save.
You can change the branch exclusion settings here, or contact your Bito workspace admin at evan@preset.io.

[codecov]

Codecov Report

❌ Patch coverage is 98.07692% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 64.64%. Comparing base (c6242a6) to head (ae2e5a3).
⚠️ Report is 6 commits behind head on remove-legacy-viz-pipeline.

Files with missing lines	Patch %	Lines
...plugins/legacy-plugin-chart-world-map/src/index.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@                      Coverage Diff                       @@
##           remove-legacy-viz-pipeline   #41720      +/-   ##
==============================================================
+ Coverage                       64.62%   64.64%   +0.01%     
==============================================================
  Files                            2684     2687       +3     
  Lines                          148431   148482      +51     
  Branches                        34249    34272      +23     
==============================================================
+ Hits                            95930    95989      +59     
+ Misses                          50739    50731       -8     
  Partials                         1762     1762              

Flag	Coverage Δ
javascript	69.43% <98.07%> (+0.03%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.