feat(telegram): normalize OTC symbols and add live bridge smoke

[LimiNode]

What changed

• canonicalize Telegram OTC symbols to the project form BASE_OTC;
• recognize common spellings such as EURUSD_OTC, EURUSD-OTC, EURUSDOTC, EURUSD OTC, and EUR/USD OTC;
• preserve explicit OTC market classification for signals and outcomes;
• recognize separated OTC outcome forms, including EURUSD OTC WIN and OTC EURUSD LOSS;
• deduplicate semantically identical overlapping outcome matches and fail closed on conflicting overlaps;
• keep all valid outcome spans as signal-blocking spans, so ambiguous WIN/LOSS markers cannot become executable signals;
• round-trip parser recognition settings through bridge config JSON;
• add deterministic live bridge smoke support backed by tg-client-stdio;
• add parser, bridge-config, and live-batch regression coverage.

Validation

• telegram_signal_parser_test: 18/18 passed;
• telegram_signal_bridge_test: 3/3 passed;
• telegram_signal_bridge_smoke: passed;
• live authorized bridge smoke reached SERVER_STARTED through the configured proxy and session;
• live batch regression confirmed 8 signals and 2 outcomes remain separate;
• ambiguous outcome regression confirms EURUSD BUY 5m with both WIN and LOSS markers produces no signal or outcome;
• git diff --check: passed.

The live smoke executable intentionally stops after the first executable signal; the full multiline batch is covered by the parser regression test.