feat: start ephemeral timers when the chat is noticed #17483

Job	Run time
cargo deny	30s
Lint Rust	2m 47s
Check if node constants are up to date	3s
Build C library (ubuntu-latest)	7m 55s
Build C library (macos-latest)	2m 12s
Check provider database	4s
Rust doc comments	3m 41s
Python lint	10s
Build deltachat-rpc-server (ubuntu-latest)	7m 31s
Rust tests (ubuntu-latest, 1.83.0)	9m 12s
Rust tests (windows-latest, 1.83.0)	8m 5s
Rust tests (macos-latest, 1.83.0)	10m 58s
Build deltachat-rpc-server (macos-latest)	7m 46s
Rust tests (ubuntu-latest, 1.77.0)	9m 30s
Build deltachat-rpc-server (windows-latest)	7m 37s
CFFI Python tests (ubuntu-latest, 3.13)	5m 3s
CFFI Python tests (macos-latest, 3.13)	4m 46s
CFFI Python tests (ubuntu-latest, pypy3.10)	6m 10s
CFFI Python tests (macos-latest, pypy3.10)	5m 27s
CFFI Python tests (ubuntu-latest, 3.7)	4m 50s
JSON-RPC Python tests (ubuntu-latest, 3.13)	2m 34s
JSON-RPC Python tests (macos-latest, 3.13)	2m 7s
JSON-RPC Python tests (windows-latest, 3.13)	2m 56s
JSON-RPC Python tests (ubuntu-latest, pypy3.10)	1m 49s
JSON-RPC Python tests (macos-latest, pypy3.10)	2m 7s
JSON-RPC Python tests (ubuntu-latest, 3.7)	1m 35s
	1h 57m 25s

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