krishvishal opened a new pull request, #3108:
URL: https://github.com/apache/iggy/pull/3108
## Summary
- Add `Operation::Register` as a VSR-level operation that goes through
consensus to create durable client sessions, giving each client a deterministic
session number (= commit op number) agreed upon by all replicas.
- Add `session` field to `RequestHeader` with wire-layer validation:
register requires `session=0, request=0`; all other operations require
`session>0, request>0`.
- Split `ClientTable` into session-aware paths: `check_register()` /
`commit_register()` for registration, and `check_request()` / `commit_reply()`
with session + strict request monotonicity validation (`NoSession`,
`SessionMismatch`, `RequestGap).
- Add `ConsensusSession` (SDK) for client-side session lifecycle and
`SessionManager` (server-ng) for transport-to-consensus bridging.
- Add combined `login_register` handler: phase 1 verifies credentials
locally, phase 2 submits register through consensus.
- Add `RequestFrame2`/`ResponseFrame2` with `request_id` for
request-response correlation and pipelining support.
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