feat: start ephemeral timers when the chat is noticed #17484

Job	Run time
Lint Rust	2m 39s
Check if node constants are up to date	6s
Build C library (ubuntu-latest)	2m 35s
cargo deny	32s
Build C library (macos-latest)	2m 23s
Rust doc comments	20s
Check provider database	4s
Python lint	11s
Build deltachat-rpc-server (ubuntu-latest)	2m 32s
Rust tests (ubuntu-latest, 1.83.0)	3m 6s
Build deltachat-rpc-server (macos-latest)	2m 29s
Rust tests (windows-latest, 1.83.0)	9m 44s
Build deltachat-rpc-server (windows-latest)	6m 12s
Rust tests (macos-latest, 1.83.0)	3m 20s
Rust tests (ubuntu-latest, 1.77.0)	3m 29s
CFFI Python tests (ubuntu-latest, 3.13)	5m 0s
CFFI Python tests (macos-latest, 3.13)	4m 43s
CFFI Python tests (ubuntu-latest, pypy3.10)	6m 8s
CFFI Python tests (macos-latest, pypy3.10)	5m 25s
CFFI Python tests (ubuntu-latest, 3.7)	5m 24s
JSON-RPC Python tests (ubuntu-latest, 3.13)	2m 23s
JSON-RPC Python tests (macos-latest, 3.13)	2m 6s
JSON-RPC Python tests (windows-latest, 3.13)	3m 3s
JSON-RPC Python tests (ubuntu-latest, pypy3.10)	2m 29s
JSON-RPC Python tests (macos-latest, pypy3.10)	2m 11s
JSON-RPC Python tests (ubuntu-latest, 3.7)	2m 19s
	1h 20m 53s

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