D6 hotfix - the material_items migration crashed Postgres at deploy

server_default=sa.text('1') on a Boolean: SQLite coerces integer 1, Postgres
refuses it (DatatypeMismatch: column 'active' is of type boolean but default
expression is of type integer) - so 'verified end-to-end on a scratch DB' was
true and insufficient, because the scratch DB was SQLite. Found in production
2026-08-21: the wp.controls.dev api container crash-looped on alembic upgrade
and the site served static pages with a 502 API until the table was created
by hand from the db container (identical DDL, alembic_version stamped to
a1b8c6d4e2f9, so this fixed migration is a no-op there).

Now sa.true() - which the location-taxonomy migration next door used
correctly all along, and which is why IT applied to production without
incident. materials_check gains the static pin: every Boolean server_default
in every migration must be sa.true()/sa.false(). Verified: alembic --sql
offline render for the postgresql dialect emits DEFAULT true; the full chain
still applies on a scratch SQLite.

Items: D6 (the migration), CR-013 surface. Probe: materials_check +1 static
check (its browser half was env-blocked today - headless browser would not
start; the fix is exercised entirely by the static half and the two renders).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/materials_check.py

@@ -54,6 +54,20 @@ def main():
     chk("locations and materials are both instances of it - not a copy beside it",
         "locList = WPListImport(" in suite and "matList = WPListImport(" in suite
         and "function locImport(dryRun){ locList.importText" in suite)
+    # The 2026-08-21 outage, pinned: a Boolean server_default of sa.text('1')
+    # passes on SQLite (which coerces 1) and crash-loops Postgres at deploy
+    # (DatatypeMismatch). Every migration must say sa.true()/sa.false().
+    import re as _re
+    bad = []
+    vdir = os.path.join(ROOT, "server", "alembic", "versions")
+    for fn in sorted(os.listdir(vdir)):
+        if not fn.endswith(".py"):
+            continue
+        for ln in open(os.path.join(vdir, fn), encoding="utf-8"):
+            if "Boolean" in ln and "server_default" in ln and                not _re.search(r"server_default=sa\.(true|false)\(\)", ln):
+                bad.append("%s: %s" % (fn, ln.strip()[:90]))
+    chk("no migration gives a Boolean a non-portable server_default "
+        "(sa.true()/sa.false() only)", not bad, ascii_(bad[:3]))
     model = open(os.path.join(ROOT, "server", "models.py"), encoding="utf-8").read()
     mat_block = model[model.find("class MaterialItem"):model.find("class WpFile")]
     cols = re.findall(r"^\s+(\w+): Mapped", mat_block, re.M)