Fixes #1683.

Problem

TablePro crashed (EXC_BREAKPOINT / Swift trap) on the NIO channel thread when connecting to some Oracle databases. Proven by symbolicating the shipped OracleDriver 1.2.11 crash binary (UUID-matched): the trap was inside ServerSidePiggyback.decode in OracleNIO, at a non-throwing moveReaderIndex(forwardBy:). Oracle 12c+ sends a .sync server-side piggyback during normal session setup; on some servers the packet is shorter than the decoder's fixed skips, so the move ran past the buffer end and trapped. A trap is not catchable by the connection's error handling, so the whole app died on connect.

Fix

The fix lives in the OracleNIO fork: TableProApp/oracle-nio#5. This PR bumps the app's oracle-nio pin to that commit and adds the changelog entry.

The fork change hardens the connection-handshake decode path so a short or unexpected server packet surfaces a decoding error (or is ignored, for informational piggybacks) instead of trapping:

• ServerSidePiggyback.decode uses throwing buffer moves.
• The server-side piggyback fatalError in the channel handler is replaced with informational handling.
• Protocol.decode FDO parsing is bounds-checked and computed in Int (no UInt8 overflow).
• BackendError.decode batch indexing is bounds-guarded.
• The ByteBuffer UB/SB readers throw or return nil instead of trapping on bad length prefixes.
• Regression tests cover each path.

Notes

• Merge oracle-nio#5 first, then the pin here points at it.
• Registry plugin: after merge, plugin-oracle-v1.2.12 needs to be tagged so the rebuilt OracleDriver reaches users via plugin auto-update.
• Local swift test/build is blocked by an Xcode 27 beta toolchain issue in a dependency; the fork CI and an Xcode build validate.