feat(lanes): per-lane database, Redis, and .env isolation (A1+A2)

Gives each lane its own slot-derived runtime (ports, detached process
lifecycle, profile-driven hooks) and its own database/Redis logical
index/.env file, so two lanes running the same repo's stack at once no
longer share state. Machine-level DB/Redis credentials live at
~/.ccam/secrets.env (mode 0600, never returned by any route); a hook's
output is redacted of that password (raw and URL-encoded forms) before
it reaches a log file or the lane_hook_output websocket broadcast.
Wired into provision/up/reset/remove; reset accepts --keep-db to skip
the drop/recreate/migrate/reseed block entirely.

server/data/profile-templates/postgres-compose/hooks/db-create.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+# ─────────────────────────────────────────────────────────────────────────────
+# db-create.sh – Create this lane's Postgres database inside a docker-compose
+# service, via `createdb`. Ported verbatim from Shipyard's own lane-bootstrap
+# / lane-up / lane-reset scripts, so a Postgres-via-compose repo gets parity
+# by copying this template into its own .ccam/profile/hooks/.
+#
+# Called as: db-create.sh <db-name>  (also available as $DB_NAME)
+# Requires, declared in the repo's own profile.env:
+#   COMPOSE_FILE   path to the docker-compose file (e.g. "$LANE_DIR/docker-compose.yml")
+#   DB_SERVICE     the compose service name running Postgres
+# Provided by CCAM's hook environment (server/lib/secrets.js):
+#   PG_USER        (PG_PASS is deliberately not exported — trust auth inside the
+#                    compose network needs no password for this call)
+# ─────────────────────────────────────────────────────────────────────────────
+# @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
+set -euo pipefail
+
+NAME="${1:-$DB_NAME}"
+[ -n "$NAME" ] || { echo "db-create: no database name given" >&2; exit 1; }
+
+if docker compose -f "$COMPOSE_FILE" exec -T "$DB_SERVICE" \
+     psql -U "$PG_USER" -tAc "SELECT 1 FROM pg_database WHERE datname='$NAME'" | grep -q 1; then
+  echo "db-create: $NAME already exists"
+  exit 0
+fi
+
+docker compose -f "$COMPOSE_FILE" exec -T "$DB_SERVICE" createdb -U "$PG_USER" "$NAME"
+echo "db-create: created $NAME"