fix: localize lede analysis sentence in motions articles across all 14 languages

[Copilot]

generateMotionsContent embedded a hardcoded English fragment in the lede paragraph, causing every non-English article to switch mid-sentence into English.

Changes

• src/types/common.ts — Added ledeAnalysis: string to MotionsStrings interface
• src/constants/language-articles.ts — Added ledeAnalysis entries with {DATE_FROM}/{DATE_TO} placeholders for all 14 languages (en, sv, da, no, fi, de, fr, es, nl, ar, he, ja, ko, zh)
• src/generators/motions-content.ts — Replaced hardcoded English with resolved localized string

// Before
`… analysis of voting records from ${escapeHTML(dateFromStr)} to ${escapeHTML(dateStr)} provides insights into legislative decision-making and party discipline.`

// After
const ledeAnalysisRaw = strings.ledeAnalysis
  .replace('{DATE_FROM}', dateFromStr)
  .replace('{DATE_TO}', dateStr);
// …
`… ${escapeHTML(ledeAnalysisRaw)}`

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