feat: extract shared infrastructure from shared_lib

Phase 1-3 of decoupling plan:
- Shared DB, models, infrastructure, browser, config, utils
- Event infrastructure (domain_events outbox, bus, processor)
- Structured logging
- Generic container concept (container_type/container_id)
- Alembic migrations for all schema changes

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

editor/node_modules/.bin/esbuild

@@ -0,0 +1 @@
+../esbuild/bin/esbuild

editor/node_modules/.bin/loose-envify

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+../loose-envify/cli.js