fix(setup.sh): detect stale DB volume, run Alembic migrations on startup

- Before bringing up the stack, check if the agent-db volume exists but
  is missing the expected database (left from a previous broken run with
  wrong POSTGRES_DB). Offer to wipe and re-init automatically.
- After docker compose up, wait for pg_isready then run
  `alembic upgrade head` inside the agent container so tables are created
  before the agent attempts to use them.
- Restart agent-service after migrations so it connects to a fully
  initialized database on its first attempt.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

setup.sh

@@ -380,7 +380,47 @@ ask "Start the agent stack now? [Y/n]"
 read -rp "  > " _START
 if [[ "${_START:-Y}" =~ ^[Yy] ]]; then
     cd "$SCRIPT_DIR"
+
+    # If the DB volume exists but was initialized with a different POSTGRES_DB,
+    # the database won't exist inside it. Detect this and offer a clean wipe.
+    _VOL="$(docker volume ls -q --filter name=odoo-ai_agent-db-data 2>/dev/null | head -1)"
+    if [[ -n "$_VOL" ]]; then
+        # Spin up just the DB to check
+        docker compose up -d agent-db >/dev/null 2>&1
+        sleep 3
+        if ! docker exec activeblue-agent-db psql -U "$POSTGRES_USER" -lqt 2>/dev/null \
+                | cut -d'|' -f1 | grep -qw "$POSTGRES_DB"; then
+            warn "DB volume exists but database '${POSTGRES_DB}' is missing (left from a previous broken run)"
+            ask "  Wipe the agent-db volume and re-init? [Y/n]"
+            read -rp "  > " _WIPE
+            if [[ "${_WIPE:-Y}" =~ ^[Yy] ]]; then
+                docker compose down -v
+                info "  Volume wiped"
+            fi
+        fi
+    fi
+
     docker compose up -d
+    info "Waiting for agent-db to be ready..."
+    for _i in $(seq 1 15); do
+        if docker exec activeblue-agent-db pg_isready -U "$POSTGRES_USER" -d "$POSTGRES_DB" \
+                >/dev/null 2>&1; then
+            break
+        fi
+        sleep 2
+    done
+
+    # Run Alembic migrations so tables exist before the agent needs them
+    info "Running database migrations..."
+    if docker exec activeblue-agent \
+            alembic -c agent_service/migrations/alembic.ini upgrade head 2>&1; then
+        info "Migrations applied"
+    else
+        warn "Migration command failed — tables may be missing. Check alembic output above."
+    fi
+
+    # Restart agent so it picks up a healthy DB on its first connect attempt
+    docker compose restart agent-service
     echo ""
     info "Stack started. Tailing logs (Ctrl-C to stop):"
     echo ""