[migration] reorder system tables / meta-schema migration into bootstrap_migration
Also fix a bug in the backwards-compat eid_type_source method where it
returned an extid (possibly null) instead of a source name.
With these changes, migrating a database from cw 3.12 is now possible.
Closes #4962681
@echo off
rem = """-*-Python-*- script
rem -------------------- DOS section --------------------
rem You could set PYTHONPATH or TK environment variables here
python -x "%~f0" %*
goto exit
"""
# -------------------- Python section --------------------
import sys
from os.path import join, dirname, normpath
sys.path.insert(0, normpath(join(dirname(__file__), '..', '..')))
from cubicweb.cwctl import run
run(sys.argv[1:])
DosExitLabel = """
:exit
rem """