fix: suppress bool->int8 false-positive column type change from TABLE_MAP metadata

[shockdav]

MySQL/MariaDB binlog TABLE_MAP metadata cannot express the TINYINT(1) display width. A column that the snapshot typed as bool therefore always arrives on the wire as int8, and shouldReportColumnTypeChange reports it as a column type change once per row-event, forever.

On a busy table this is unbounded log growth. In our deployment (MariaDB 10.x → ClickHouse, stable-v0.37.0) a single tinyint(1) column on the hottest table produced ~34 GB of this one WARN line — about 83% of the flow-worker's total log volume — before it filled the host's disk and stalled the mirror:

{"level":"WARN","msg":"column type change detected from TABLE_MAP_EVENT, not propagating","table":"tradersync.trades","column":"symboldata","from":"bool","to":"int8"}

The source column was, and still is, tinyint(1); nothing changed. The mirror column is Bool and the data is correct either way — the warning is a pure false positive.

This suppresses exactly the bool (schema) → int8 (wire) pairing, mirroring the existing MariaDB UUID/INET wire-kind special case. A real change — bool → anything other than int8, or any non-bool schema kind — is still reported.

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✅ ilidemi
❌ shockdav
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[shockdav]

Pushed a second commit covering the same failure mode for ENUM: binlog TABLE_MAP encodes ENUM under the generic STRING column type, so a snapshot-typed enum column always arrives as string on the wire and warns once per row-event forever (we measured 4 enum columns on one table producing ~90 warn lines/min). Same shape of suppression, scoped to exactly the enum->string pairing.

[ilidemi]

Thanks for the contribution @shockdav! Would you be able to sign the CLA so we can merge?