WIP: refactor: New remote membership handling #1978

Draft

nex wants to merge 5 commits from nex/feat/centralise-remote-memberships into main

Author	SHA1	Message	Date
timedout	64c0964102	fix: Only insert event ID after checking/performing signatures Some checks failed Checks / Prek / Check changed files (pull_request) Successful in 4s Details Checks / Changelog / Check changelog is added (pull_request_target) Failing after 6s Details Documentation / Build and Deploy Documentation (pull_request) Successful in 1m0s Details Checks / Prek / Pre-commit & Formatting (pull_request) Successful in 2m7s Details Checks / Prek / Clippy and Cargo Tests (pull_request) Failing after 5m24s Details	2026-07-13 02:32:44 +01:00
timedout	c1629c96af	fix: Ensure events received from federated invites have event IDs	2026-07-13 02:32:44 +01:00
timedout	142e95b5a1	fix: Don't allow event ID-less events to make their way into the DB Some checks failed Checks / Prek / Check changed files (pull_request) Successful in 4s Details Checks / Changelog / Check changelog is added (pull_request_target) Failing after 6s Details Documentation / Build and Deploy Documentation (pull_request) Successful in 56s Details Checks / Prek / Pre-commit & Formatting (pull_request) Successful in 1m16s Details Checks / Prek / Clippy and Cargo Tests (pull_request) Failing after 4m6s Details	2026-07-13 01:28:14 +01:00
timedout	21918e7ba4	refactor: Use new make_join and send_join functions in membership service Some checks failed Checks / Changelog / Check changelog is added (pull_request_target) Failing after 6s Details Documentation / Build and Deploy Documentation (pull_request) Successful in 59s Details Checks / Prek / Check changed files (pull_request) Successful in 6s Details Checks / Prek / Pre-commit & Formatting (pull_request) Successful in 1m13s Details Checks / Prek / Clippy and Cargo Tests (pull_request) Successful in 12m57s Details	2026-07-13 00:51:39 +01:00
timedout	a24019a494	feat: Write new `make_join` and `send_join` handlers Some checks failed Auto Labeler / Apply labels based on changed files (pull_request_target) Successful in 2s Details Documentation / Build and Deploy Documentation (pull_request) Successful in 1m2s Details Checks / Prek / Check changed files (pull_request) Successful in 5s Details Checks / Prek / Pre-commit & Formatting (pull_request) Successful in 1m12s Details Checks / Changelog / Check changelog is added (pull_request_target) Failing after 6s Details Checks / Prek / Clippy and Cargo Tests (pull_request) Failing after 3m49s Details	2026-07-12 23:39:59 +01:00