fix(ci): replace retired macos-13 runner with macos-15

Author: clark-mackey

.github/workflows/test-installer.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false  # Continue testing other OS even if one fails
       matrix:
-        os: [ubuntu-latest, macos-latest, macos-13]
+        os: [ubuntu-latest, macos-latest, macos-15]
 
     steps:
       - name: Checkout code

logs/CHANGELOG.md

@@ -35,6 +35,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Dogfood update: synced local LFG install to latest product version. AI rules updated from 115→213 lines (adds session handoff, token self-assessment, entry verbosity, incident format, cross-references, archival summaries). Fixed stale related_docs paths in config. Files: `.augment/rules/log-file-maintenance.md`, `.logfile-config.yml`. Commit: `ec50460`
 
+### Fixed
+
+- CI: replaced retired `macos-13` runner with `macos-15` in test-installer workflow. Files: `.github/workflows/test-installer.yml`. Commit: `4179209`
+
 ### Changed
 
 - LFG Schema Proposal revised with tiered approach - Code-Police review accepted Phase 1 (schema), rejected Phase 2/3 (CLI tools, VS Code). Added tiered metadata: Tier 1 inline for CHANGELOG (~18 tokens), Tier 2 condensed block for DEVLOG decisions (~25 tokens), Tier 3 full block for context only. Human readability preserved. Token overhead reduced 46% vs original proposal. Files: `project/docs/proposals/lfg-schema-proposal.md`. Commit: `cfee835`