Fix race condition in binlog provider causing file-not-found errors

[Copilot]

Race condition in provideLogs where binlog files were added to ObjectProvider before reading their timestamps. Consumer goroutine (sendEventsFromBinlogFiles) could retrieve, parse, and delete files before timestamp reads completed.

Changes:

• Reordered operations in provideLogs to read GetBinlogStartTimestamp before p.AddObject
• Prevents filesystem race where consumer deletes file while producer still needs it

// Before: timestamp read after provider add (race)
err = p.AddObject(logFile)
timestamp, err := GetBinlogStartTimestamp(binlogPath, gomysql.MySQLFlavor)

// After: timestamp read before provider add (safe)
timestamp, err := GetBinlogStartTimestamp(binlogPath, gomysql.MySQLFlavor)
err = p.AddObject(logFile)

Resolves open /tmp/mysql-bin.XXXXXX: no such file or directory errors in mysql_base_tests.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>[FEATURE] address mysql base test failure</issue_title>
<issue_description>### What feature would you like?

we need to address the following failure

wal-g_mysql_base_tests  | INFO: 2026/02/11 13:08:43.585670 connection accepted from 127.0.0.1:60924
wal-g_mysql_base_tests  | INFO: 2026/02/11 13:08:43.586202 connection created
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.586391 Unhandled query: SET NAMES latin1
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.586593 Unhandled query: SELECT UNIX_TIMESTAMP()
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.628024 Unhandled query: SET @master_heartbeat_period= 5000000000
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.628258 Unhandled query: SET @master_binlog_checksum= @@global.binlog_checksum
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.751069 Unhandled query: SET @slave_uuid= 'c034da08-074a-11f1-87b4-6ebf9cd30c15'
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.752636 disable 100 continue false
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.754313 HTTP response code: 200
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.754340 request GET response: 99 request: 0
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.754361 HTTP response code: 200
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.754382 request GET response: 99 request: 0
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.756296 HTTP response code: 200
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.756319 request GET response: 5482 request: 0
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.756332 HTTP response code: 200
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.756353 request GET response: 5482 request: 0
wal-g_mysql_base_tests  | INFO: 2026/02/11 13:08:43.759126 downloading mysql-bin.000001 into /tmp/mysql-bin.000001
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.760341 HTTP response code: 404
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.760395 request GET response: 425 request: 0
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.760424 HTTP response code: 404
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.760444 request GET response: 425 request: 0
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.761970 HTTP response code: 404
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.761992 request GET response: 427 request: 0
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.762009 HTTP response code: 404
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.762032 request GET response: 427 request: 0
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.763503 HTTP response code: 404
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.763528 request GET response: 429 request: 0
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.763542 HTTP response code: 404
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.763559 request GET response: 429 request: 0
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.764894 HTTP response code: 404
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.764920 request GET response: 425 request: 0
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.764941 HTTP response code: 404
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.764958 request GET response: 425 request: 0
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.766391 HTTP response code: 404
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.766417 request GET response: 421 request: 0
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.766434 HTTP response code: 404
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.766455 request GET response: 421 request: 0
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.768087 HTTP response code: 200
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.768115 request GET response: 458 request: 0
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.768139 HTTP response code: 200
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.768160 request GET response: 458 request: 0
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.768543 No crypter has been selected
wal-g_mysql_base_tests  | INFO: 2026/02/11 13:08:43.770911 Synced binlog file mysql-bin.000001
wal-g_mysql_base_tests  | INFO: 2026/02/11 13:08:43.770943 downloading mysql-bin.000002 into /tmp/mysql-bin.000002
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.772279 HTTP response code: 200
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.772308 request GET response: 472 request: 0
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.772327 HTTP response code: 200
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.772344 request GET response: 472 request: 0
wal-g_mysql_base_tests  | DEBUG: 2026/02/11 13:08:43.772719 No crypter has been selected
wal-g_mysql_base_tests  | INFO: 2026/02/11 13:08:43.773194 Synced binlog file mysql-bin.000002
wal-g_mysql_base_tests  | INFO: 2026/02/11 13:08:43.773296 ...

</details>



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- Fixes chipitsine/wal-g#38

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