test(audit): fix critical test suite deadlocks and write exhaustive architectural report

- Fix 'Triple Bingo' history synchronization explosion during streaming

- Implement stateless event buffering in ApiHookClient to prevent dropped events

- Ensure 'tool_execution' events emit consistently across all LLM providers

- Add hard timeouts to all background thread wait() conditions

- Add thorough teardown cleanup to conftest.py's reset_ai_client fixture

- Write highly detailed report_gemini.md exposing asyncio lifecycle flaws

config.toml

@@ -1,5 +1,5 @@
 [ai]
-provider = "gemini_cli"
+provider = "gemini"
 model = "gemini-2.5-flash-lite"
 temperature = 0.0
 max_tokens = 8192
@@ -15,7 +15,7 @@ paths = [
     "C:\\projects\\manual_slop\\tests\\artifacts\\temp_livetoolssim.toml",
     "C:\\projects\\manual_slop\\tests\\artifacts\\temp_liveexecutionsim.toml",
 ]
-active = "C:\\projects\\manual_slop\\tests\\artifacts\\temp_livecontextsim.toml"
+active = "C:\\projects\\manual_slop\\tests\\artifacts\\temp_liveexecutionsim.toml"
 
 [gui.show_windows]
 "Context Hub" = true