The schema applies itself, and the setup script stops hiding failures

Migrations were run by hand and nothing recorded which had run, so
re-running the setup script against an existing database failed on the
first CREATE TABLE, and shipping a new migration gave an operator no way
to know whether an estate had it. A missed migration is not a startup
error - it is a query referencing a column that is not there, surfacing
later on whichever endpoint touches it first.

server/internal/migrate applies pending migrations at boot and refuses to
start against a schema it does not match. One transaction per file
holding both the DDL and the row that records it; an advisory lock so two
servers starting at once cannot both apply 008; checksums so an edited
migration is refused by name rather than silently skipped; numeric
ordering so 010 does not run before 009. `migrate -baseline N` adopts a
database built before any of this existed, because "the clients table
exists" does not say whether 007's index does.

Verified on the live database: adopted 001-007, applied 008.

008 adds two indexes on `purchases`, found by asking the database which
foreign keys had nothing behind them and then checking what queries the
table. The conversion report filters client_id + occurred_at, which is
exactly the estate-wide case with no site to narrow it.

run-local.sh had two bugs, both found by running it rather than reading
it: it reused a broker container whose bind mount pointed at a directory
that no longer existed, and it discarded stderr on the mosquitto_passwd
call, so under `set -e` it exited at step 5 with no output at all.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HViLj9gYNRtSr7YVZmW5sn

server/cmd/behavision-server/migrate.go

@@ -0,0 +1,107 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/loyaly/behavision-server/internal/migrate"
+	"github.com/loyaly/behavision-server/internal/store"
+	"github.com/loyaly/behavision-server/migrations"
+)
+
+// runMigrate is the operator's view of the schema.
+//
+// The server applies pending migrations itself at boot, so this exists for the
+// two things it cannot do: SAY what a database is on without changing it, and
+// adopt a database whose schema predates the tracking table.
+func runMigrate(args []string) error {
+	fs := flag.NewFlagSet("migrate", flag.ExitOnError)
+	status := fs.Bool("status", false, "print what this database has recorded and exit")
+	baseline := fs.Int("baseline", 0,
+		"record migrations up to this version as applied WITHOUT running them")
+	fs.Usage = func() {
+		fmt.Fprint(os.Stderr, `usage: behavision-server migrate [flags]
+
+  no flags     apply everything this database has not recorded
+  -status      print the recorded versions and what is pending
+  -baseline N  adopt a database built before migration tracking existed:
+               record 1..N as applied without running them. Use it once, on a
+               database whose schema you know already matches those files.
+
+DATABASE_URL is required.
+`)
+		fs.PrintDefaults()
+	}
+	if err := fs.Parse(args); err != nil {
+		return err
+	}
+
+	dsn := os.Getenv("DATABASE_URL")
+	if dsn == "" {
+		return fmt.Errorf("DATABASE_URL is required")
+	}
+	ctx := context.Background()
+	st, err := store.Open(ctx, dsn)
+	if err != nil {
+		return err
+	}
+	defer st.Close()
+
+	files, err := migrate.Load(migrations.FS)
+	if err != nil {
+		return err
+	}
+
+	if *baseline > 0 {
+		marked, err := migrate.Baseline(ctx, st.Pool(), migrations.FS, *baseline)
+		if err != nil {
+			return err
+		}
+		if len(marked) == 0 {
+			fmt.Println("nothing to adopt - every migration up to that version was already recorded")
+			return nil
+		}
+		fmt.Printf("adopted without running: %s\n", strings.Join(marked, ", "))
+		fmt.Println("run `migrate` (no flags) to apply anything after that.")
+		return nil
+	}
+
+	if *status {
+		done, err := migrate.Status(ctx, st.Pool())
+		if err != nil {
+			return err
+		}
+		seen := map[int]migrate.Record{}
+		for _, r := range done {
+			seen[r.Version] = r
+		}
+		for _, f := range files {
+			r, ok := seen[f.Version]
+			switch {
+			case !ok:
+				fmt.Printf("  pending   %s\n", f.Name)
+			case r.Baselined:
+				fmt.Printf("  adopted   %s  (recorded, never run here)\n", f.Name)
+			case r.Checksum != f.Checksum:
+				fmt.Printf("  CHANGED   %s  (the file differs from what was applied)\n", f.Name)
+			default:
+				fmt.Printf("  applied   %s\n", f.Name)
+			}
+		}
+		return nil
+	}
+
+	applied, err := migrate.Apply(ctx, st.Pool(), migrations.FS)
+	if err != nil {
+		return err
+	}
+	if len(applied) == 0 {
+		fmt.Println("schema up to date")
+		return nil
+	}
+	fmt.Printf("applied: %s\n", strings.Join(applied, ", "))
+	return nil
+}