fix(migrations): bound the lock wait of 0475 and 0480, and of every file after

0475 and 0480 added their columns with a bare ALTER TABLE, which waits
for its table lock behind every open transaction while every write to
the table queues behind it. Both now run in a DO block with a five
second lock_timeout and carry the boot's retry marker; the effect is
the same and both stay safe to run again.

Neither has shipped in a release. A database that already applied them
is unaffected: prisma migrate deploy and migrate status ignore the
checksum of an applied migration (checked against a database migrated
with the old files), so nothing is re-run and nothing is reported.

The lock-timeout guard now refuses, from 0475 on, any statement that
takes a table lock outside such a block.

prisma/migrations/0475_mental_health_assessment_wording/migration.sql

@@ -10,5 +10,16 @@
 --
 -- Reversibility: dropping the column loses only that marker; the scores and
 -- the encrypted answers do not depend on it.
+--
+-- The lock wait is bounded inside a DO block and the file is safe to run
+-- again, so the boot retries it on a lock timeout.
+--
+-- @retry-on-lock-timeout
 
-ALTER TABLE "mental_health_assessments" ADD COLUMN IF NOT EXISTS "wording" TEXT;
+DO $migration$
+BEGIN
+    PERFORM set_config('lock_timeout', '5s', true);
+    ALTER TABLE "mental_health_assessments"
+        ADD COLUMN IF NOT EXISTS "wording" TEXT;
+END
+$migration$;

prisma/migrations/0480_status_note_failure_streak/migration.sql

@@ -7,5 +7,16 @@
 -- up to two hours. A written or re-dated note resets it to zero.
 --
 -- Existing rows start at zero, which is the five-minute window they had.
-ALTER TABLE "insight_status_caches"
-  ADD COLUMN IF NOT EXISTS "failure_streak" INTEGER NOT NULL DEFAULT 0;
+--
+-- The lock wait is bounded inside a DO block and the file is safe to run
+-- again, so the boot retries it on a lock timeout.
+--
+-- @retry-on-lock-timeout
+
+DO $migration$
+BEGIN
+    PERFORM set_config('lock_timeout', '5s', true);
+    ALTER TABLE "insight_status_caches"
+        ADD COLUMN IF NOT EXISTS "failure_streak" INTEGER NOT NULL DEFAULT 0;
+END
+$migration$;