Initial commit: AirCoding V1.0.0 Alpha architecture baseline

Complete architecture document set with multi-model review remediation:
- Frozen interface contracts, runtime semantics, DB schemas
- Event/tool/error/provider registries
- Scheduler and main agent state machines
- C4 module/code views, solution architecture, baseline V1
- Multi-model review reports and joint assessment
- Phase-gate remediation complete (P0/P1/P2/UX resolved)
- Implementation plan with T-000A through T-045
- Reference folders kept as placeholders only

reference/atuin-18.16.1/.mailmap

@@ -0,0 +1,14 @@
+networkException <git@nwex.de> <github@nwex.de>
+Violet Shreve <github@shreve.io> <jacob@shreve.io>
+Chris Rose <offline@offby1.net> <offbyone@github.com>
+Conrad Ludgate <conradludgate@gmail.com> <conrad.ludgate@truelayer.com>
+Cristian Le <github@lecris.me> <cristian.le@mpsd.mpg.de>
+Dennis Trautwein <git@dtrautwein.eu> <dennis.trautwein@posteo.de>
+Ellie Huxtable <ellie@atuin.sh> <e@elm.sh> 
+Ellie Huxtable <ellie@atuin.sh> <ellie@elliehuxtable.com> 
+Frank Hamand <frankhamand@gmail.com> <frank.hamand@coinbase.com>
+Jakob Schrettenbrunner <dev@schrej.net> <jakob.schrettenbrunner@telekom.de>
+Nemo157 <git@nemo157.com> <github@nemo157.com>
+Richard de Boer <git@tubul.net> <github@tubul.net>
+Sandro <sandro.jaeckel@gmail.com> <sandro.jaeckel@sap.com>
+TymanWasTaken <tbeckman530@gmail.com> <ty@blahaj.land>