feat(codespace): replace broken odoo-image blueprint with python:3.12-slim pattern

The previous blueprint (upstream odoo/docker:19.0 + COPY + deploy.command)
systematically broke inside Easypanel's inline-dockerfile build context:
  - COPY files not available
  - wkhtmltopdf/libldap-2.5-0 package names absent from Debian bookworm
  - Easypanel wrapped deploy.command with 'python -c …' → exit 100
  - postgres password / app env set separately → mismatch auth failure
  - cat > /etc/odoo/odoo.conf without parent dir → ENOENT

The new blueprint is what actually ran in production for 34h+ stable:
  - FROM python:3.12-slim with an inline ENTRYPOINT (no CMD wrapping)
  - init-odoo.sh: apt install build deps then pip install /mnt/os-dev
    (idempotent — skipped if import odoo works, restarts < 1 s)
  - --dev=reload,qweb,assets,xml,werkzeug baked into exec odoo
  - mkdir -p /etc/odoo /var/lib/odoo /var/log/odoo before writing odoo.conf
  - Single createFromSchema call → shared password for postgres + app
  - Bind-mount os-dev → /mnt/os-dev → hot-reload on any host edit

deploy.py prepare writes easypanel.schema.json + init-odoo.sh +
inline.Dockerfile + .db_password, all ready for TRAE Easypanel MCP
createFromSchema + deployAppService. Verified end-to-end (HTTP 200 on
/web/database/manager, hot-reload on release.py product_name edit,
CREATE DATABASE via psycopg2 + odoo UI Create Database).

Docs:
  - README.md rewritten with new layout table, troubleshooting
    playbook, daily workflow, verified-state reference table,
    old-vs-new blueprint comparison table.

.gitignore

@@ -0,0 +1,14 @@
+# Sensitive artifacts generated by `deploy.py prepare`
+.db_password
+__pycache__/
+*.pyc
+
+# Generated files (re-run `deploy.py prepare` to regenerate)
+easypanel.schema.json
+init-odoo.sh
+inline.Dockerfile
+
+# Editor
+.idea/
+.vscode/
+.DS_Store