22335474d768f99067856173ff2764b6db753f67 net: format peer+addr logs with `LogPeer` (Lőrinc)
e55ea534f74b2dd2a81e8f9972554303f7cf9c20 test: add pre-`LogPeer` net log assertion (Lőrinc)
736b17c0f0f23dca78e7266be6c98b24b0eda210 log: fix minor formatting in debug logs (Lőrinc)
9cf82bed3205d8405f56838d0e2ca0c72023a081 log: show placeholders for missing peer fields (Lőrinc)
Pull request description:
This is an alternative to #34293, but aims to address the remaining logging inconsistencies more broadly.
It extends the example fixed there to every instance, restores the original separator behavior, applies it consistently via a single helper, and adds tests for `logips` (covering both current and new behavior).
### Problem
After #28521 centralized peer address logging into `CNode::LogIP()`, the original comma separator before `peeraddr=` was lost, resulting in inconsistent formatting across net (and recent private broadcast) logs.
Some lines also had double spaces, empty fields, or mismatched format specifiers.
### Fix
Introduces `CNode::LogPeer(bool)` which always emits `peer=<id>` and, when `-logips=1`, appends `, peeraddr=<addr>`. This eliminates hand-rolled separators and makes peer identification predictable.
Minor issues (double spaces, empty placeholders, format specifiers) are fixed along the way in separate commits.
### Reproducer
Run with `-debug=net -logips=1` and observe peer log lines now show `peer=<id>, peeraddr=<addr>` (comma-separated). The new assertion in `feature_logging.py` automates this check.
ACKs for top commit:
naiyoma:
ACK 22335474d768f99067856173ff2764b6db753f67
vasild:
ACK 22335474d768f99067856173ff2764b6db753f67
sedited:
ACK 22335474d768f99067856173ff2764b6db753f67
Tree-SHA512: 562262a58c3042f139099ff4c41e3fc6a97505fe9603c2bf700a97fd0aa052954b47c14da0e50c1fc311db1ae6c04e6a92156c9b85e25c777a637b7766c1dafe
e96d9e6492