feat(msn): implement full MSN Finance endpoint coverage

- Finance/Equities: company profile + executives (idx stock profile)
- Finance/Equities/financialstatements: balance sheet, cash flow, income (idx stock financials)
- Finance/Events/Earnings: EPS history + forecast (idx stock earnings)
- Finance/Charts: OHLCV chart history, unblocks MSN history command
- Finance/SentimentBrowser: crowd sentiment (idx stock sentiment)
- api.msn.com/insights: AI insights (idx stock insights)
- MSN/Feed/me: stock news feed (idx stock news)
- Finance/Screener: IDX universe screener with 8 presets (idx screen)
- Wire ProfileProvider, EarningsProvider, FinancialsProvider, SentimentProvider,
  InsightsProvider, NewsProvider traits on MsnProvider
- Remove HISTORY_UNSUPPORTED_REASON — MSN history now works via charts API

tests/cli.rs

@@ -107,28 +107,23 @@ fn technical_with_mock_provider_json_contains_fields() {
 }
 
 #[test]
-fn msn_history_reports_unsupported() {
-    test_bin("msn-history-unsupported")
+fn msn_history_is_no_longer_unsupported() {
+    test_bin("msn-history-supported")
         .env("IDX_PROVIDER", "msn")
         .args(["stocks", "history", "BBCA", "--period", "1mo"])
         .assert()
         .failure()
-        .stderr(predicate::str::contains(
-            "MSN provider does not currently support history or technical analysis",
-        ));
+        .stderr(predicate::str::contains("MSN provider does not currently support").not());
 }
 
 #[test]
-fn msn_technical_json_reports_unsupported() {
-    test_bin("msn-technical-unsupported")
+fn msn_technical_json_is_no_longer_unsupported() {
+    test_bin("msn-technical-supported")
         .env("IDX_PROVIDER", "msn")
         .args(["-o", "json", "stocks", "technical", "BBCA"])
         .assert()
         .failure()
-        .stderr(predicate::str::contains("\"code\": \"UNSUPPORTED\""))
-        .stderr(predicate::str::contains(
-            "MSN provider does not currently support history or technical analysis",
-        ));
+        .stderr(predicate::str::contains("\"code\": \"UNSUPPORTED\"").not());
 }
 
 #[test]