profile: add progressive user profiles

Add cache-expiry profile maintenance and contextual injection, reorganize runtime code by responsibility, remove automatic favorability decay, and prepare version 1.15.0.

.gitignore

@@ -131,3 +131,9 @@ src/test/kotlin/RunTerminal.kt
 
 # Local Test Launch Point working directory
 /debug-sandbox
+
+# Local experiment/runtime artifacts
+__pycache__/
+*.py[cod]
+/nul
+/.playwright-cli/