feat(datasource): add wind, imf, gildata, sec_edgar, and sp_data sources

[wbxl2000]

Related Issue

No tracking issue — see the problem below.

Problem

The datasource gateway has launched five new backend data sources, but the kimi-datasource plugin only advertises 7 names in its get_data_source_desc enum, so the model cannot discover or route to them:

• wind — Wind 万得: A-share/fund/bond/index quotes and financials, announcements, research, macro data
• imf — IMF official datasets (IFS/BOP/DOTS/WEO/...): FX, CPI, balance of payments, GDP forecasts
• gildata — 恒生聚源: natural-language stock/fund/fund-manager screening, research reports, announcements
• sec_edgar — US SEC filings: 10-K/10-Q, XBRL metrics, Form 4 insider trades, 13F holdings, 8-K events
• sp_data — S&P Capital IQ: US company fundamentals, estimates, holders, executives, competitors

What changed

• Registered the five names in the get_data_source_desc input-schema enum and bumped the plugin 3.2.0 → 3.3.0 (bin/kimi-datasource.mjs VERSION, kimi.plugin.json, plugins/marketplace.json), following the same pattern as feat(datasource): add yuandian_law legal data source and request-id trace #611.
• SKILL.md: source count 7 → 12, five new capability rows (wording pulled from the live backend docs via get_data_source_desc), and an explicit selection policy: a user-named source is used directly; one source per simple lookup (stop after the first sufficient result); otherwise the model picks from objective capability boundaries — no prescriptive routing and no cost assumptions.
• Objective capability boundaries documented in both SKILL.md and the get_data_source_desc name schema description (e.g. yahoo_finance FX history ≈ 2 years, minute-level intraday series on wind, holders covered by yahoo_finance / sec_edgar (13F) / sp_data), so the model has neutral facts to choose with.
• Credential rotation: retry once with re-read credentials when the backend rejects the previous access token (401), so a host-side token refresh no longer fails the call.
• CHANGELOG.md 3.3.0 entry; docs (docs/zh + docs/en/customization/plugins.md): intro, latest version v3.3.0, five coverage-table rows, new US-equity-research scenario.
• Tests: the enum assertion pins all 12 sources; routing-contract assertions on the schema text; a credential-rotation retry test.
• No changeset: plugins/ changes are versioned via kimi.plugin.json / plugins/marketplace.json and shipped through the marketplace CDN (per .changeset/README.md).

Verification

• Unit: test/utils/kimi-datasource-plugin.test.ts 6/6 green.
• Live gateway, one real call_data_source_tool per new source: sec_edgar_get_company_info(AAPL), sp_get_company_info(AAPL), wind_get_stock_quote(600519.SH), imf_ifs_data(ENDE_XDC_USD_RATE, CHN), gildata_fin_query(贵州茅台最新收盘价) — all returned real data.
• Headless routing (kimi -p, fresh sessions, isolated working dirs): user-named source honored 3/3 (wind / imf / sp_data, one desc + one call each); unspecified FX query → imf (2-year Yahoo limit applied); unspecified holders query → general quote sources.

Checklist

• I have read the CONTRIBUTING document.
• I have linked a related issue, or explained the problem above.
• I have added tests that prove my feature works.
• Ran gen-changesets skill, or this PR needs no changeset. (no changeset — plugin ships via marketplace CDN)
• Ran gen-docs skill, or this PR needs no doc update. (zh/en plugin docs updated in this PR)

[changeset-bot]

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