Merge branch 'dev' into fix-ips-fixed

Commit c65a0332bc refactored IP handling but accidentally broke [ips_fixed]
by treating fixed peers as regular bootstrap sources. This caused fixed
peers to not bypass slot limits, breaking connectivity for nodes with low
peers_max values.

This fix does NOT restore:
- The fallback behavior where [ips_fixed] was used as bootstrap when [ips]
  was empty (added in 98bdb9de68, 2015)
- Any hardcoded default bootstrap IPs

These are unnecessary because addFixedPeer actively maintains connections
to fixed peers regardless of the bootstrap mechanism. Nodes with only
[ips_fixed] configured will still connect and discover peers through
their fixed connections.

Closes #636

.github/workflows/xahau-ga-macos.yml

@@ -43,22 +43,14 @@ jobs:
       # To isolate environments for each Runner, instead of installing globally with brew, 
       # use mise to isolate environments for each Runner directory.
       - name: Setup toolchain (mise)
-        uses: jdx/mise-action@v3.6.1
+        uses: jdx/mise-action@v2
         with:
-          cache: false
           install: true
-          mise_toml: |
-            [tools]
-            cmake = "3.23.1"
-            python = "3.12"
-            pipx = "latest"
-            conan = "2"
-            ninja = "latest"
-            ccache = "latest"
 
       - name: Install tools via mise
         run: |
           mise install
+          mise use cmake@3.23.1 python@3.12 pipx@latest conan@2 ninja@latest ccache@latest
           mise reshim
           echo "$HOME/.local/share/mise/shims" >> "$GITHUB_PATH"