Fix replay mode symbol resolution to use fully-qualified symbol (EXCHANGE:SYMBOL)

[randomshinichi]

Reproduce the problem

TV_AUTH_TOKEN="$TV_AUTH_TOKEN" cargo run --example export_index_btcusd_1m_backfill -- --symbol BTCUSD --exchange INDEX --tf 1m --from 2026-02-01 --to 2026-02-19       
 --out-dir /tmp/tv-repro

If you want a single command that also prints detected minute gaps right after export:

TV_AUTH_TOKEN="$TV_AUTH_TOKEN" cargo run --example export_index_btcusd_1m_backfill -- --symbol BTCUSD --exchange INDEX --tf 1m --from 2026-02-01 --to 2026-02-19       
 --out-dir /tmp/tv-repro && f=$(ls /tmp/tv-repro/*2026-02*.csv | head -n1) && awk -F, 'NR==2{p=$1;next}{d=$1-p;if(d>60)printf("gap: %s -> %s (%ss)\n",p,$1,d);p=$1}' "$f"

Summary

This fixes an issue in replay mode where symbol resolution used the bare symbol (e.g. BTCUSD) instead of the fully-qualified symbol (e.g. INDEX:BTCUSD).

In my backfill runs, this caused subtle data quality problems:

• missing 1m bars (small gaps),

• and mismatched OHLCV vs TradingView/tvdatafeed for the same timestamps.

  Root cause

  In set_replay(...), resolve_symbol(...) was called with &options.symbol (bare symbol), while non-replay path uses symbol ({exchange}:{symbol}).

  So replay requests were not consistently scoped to the intended market/exchange.

  Fix

  In src/live/websocket.rs (set_replay), changed:

  resolve_symbol(..., &options.symbol, ...)

  to:

  resolve_symbol(..., symbol, ...)

  where symbol is already built as "{exchange}:{symbol}".

  Why this is correct

  set_market builds the fully-qualified symbol once and passes it to set_replay.
  
  resolve_symbol should receive the same symbol format in replay and non-replay paths for consistent behavior.

  Validation

  I validated this with repeated BTCUSD INDEX backfills:

• Before fix: reproducible 1m gaps in exported CSV (e.g. missing minute bars around specific timestamps).

• After fix: same export flow produced gap-free 1m output for the previously failing range; bar counts and continuity aligned with expected cadence.

  Scope

• Minimal change (single-line behavior fix in replay path)

• No API changes

• No behavior change for non-replay mode