Release v0.19.1

[teknogeek0]

Patch release on top of v0.19. Covers everything merged to main since the v0.19.0 tag.

Fixed

• Partitioned-table foreign keys (fix schema.c: filter out internal partition FK clones when listing FK constraints #41): stop listing Postgres's internal per-partition FK clones (conparentid <> 0) when creating constraints directly — recreating the top-level FK already cascades to every partition, so the clones only produced a flood of constraint "..." already exists errors (and bogus single-partition FKs when referencing a partitioned table). Version-gated (PG 11+) and disabled under --defer-validate-fks, which relies on those clones on PG versions that reject NOT VALID on a partitioned parent.
• CDC float8 replay (Fix float8 precision loss during CDC replay #39): format floating-point values with their shortest round-trip representation, fixing precision loss that could break numeric WHERE-clause matching during apply and silently diverge target data.
• Follow mode (Handle endpos pipeline shutdown cleanly and reset sequences on follow #40): shut the CDC pipeline down cleanly at the configured end position, and reset sequences on the target at follow completion.

After merge: tag the merge commit v0.19.1 (annotated) and push it to trigger the multi-arch docker publish.