Resolve remaining MySQL docs review thread inconsistencies

[Copilot]

This updates the MySQL source/bootstrap documentation to resolve the review-thread mismatches between documented requirements and actual configuration behavior. The edits focus on correctness of version prerequisites, verification SQL, and bootstrap-provider field semantics.

• MySQL source doc corrections

  • Raised documented minimum to MySQL 8.0+ (to align with binlog_row_metadata = FULL usage).
  • Replaced invalid verification SQL with valid primary-side binlog status command.
  • Reworded the env-var substitution sentence for clarity.

• MySQL bootstrap provider doc alignment

  • Removed conflicting field-level bootstrap config guidance.
  • Documented bootstrap provider as kind-only for MySQL (bootstrapProvider.kind), with connection/table scope inherited from the source (host, database, tables, tableKeys).
  • Updated prerequisite wording to reflect source-owned table configuration.

sources:
  - kind: mysql
    host: ${MYSQL_HOST:-localhost}
    database: ${MYSQL_DATABASE:-mydb}
    tables: [orders, customers]
    bootstrapProvider:
      kind: mysql

SHOW MASTER STATUS;

[danielgerlag]

@copilot i think this PR is targetting the wrong branch?

[Copilot]

@copilot i think this PR is targetting the wrong branch?

You’re right — this is currently targeting main. I can’t change the PR base from this environment; please retarget the PR to the intended branch, and I’ll continue from there.

[danielgerlag]

@copilot i retargetted it, please continue

[Copilot]

@copilot i retargetted it, please continue

I checked it after retargeting and there are no additional code changes needed from my side right now. The docs fixes are in ffe9726, and the latest mysql workflow runs are passing.