fix: export_serving — Arrow-based copy, rename to analytics.duckdb

Two bugs fixed:

1. Cross-connection COPY: DuckDB doesn't support referencing another
   connection's tables as src.serving.table. Replace with Arrow as
   intermediate: src reads to Arrow, dst.register() + CREATE TABLE.

2. Catalog/schema name collision: naming the export file serving.duckdb
   made DuckDB assign catalog name "serving" — same as the schema we
   create inside it. Every serving.table query became ambiguous. Rename
   to analytics.duckdb (catalog "analytics", schema "serving" = no clash).

   SERVING_DUCKDB_PATH values updated: serving.duckdb → analytics.duckdb
   in supervisor, service, bootstrap, dev_run.sh, .env.example, docker-compose.

3. Temp file: use _export.duckdb (not serving.duckdb.tmp) to avoid
   the same catalog collision during the write phase.

Verified: 6 tables exported, serving.* queries work read-only.

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

web/.env.example

@@ -8,10 +8,10 @@ ADMIN_EMAILS=admin@beanflows.coffee
 # Database
 DATABASE_PATH=data/app.db
 # DUCKDB_PATH points to the full pipeline DB (lakehouse.duckdb) — used by SQLMesh and export_serving.
-# SERVING_DUCKDB_PATH points to the serving-only export (serving.duckdb) — used by the web app.
+# SERVING_DUCKDB_PATH points to the serving-only export (analytics.duckdb) — used by the web app.
 # Run `uv run materia pipeline run export_serving` after each SQLMesh transform to populate it.
 DUCKDB_PATH=../local.duckdb
-SERVING_DUCKDB_PATH=../serving.duckdb
+SERVING_DUCKDB_PATH=../analytics.duckdb
 
 # Auth
 MAGIC_LINK_EXPIRY_MINUTES=15

web/docker-compose.yml

@@ -10,7 +10,7 @@ services:
     env_file: .env
     environment:
       - DATABASE_PATH=/app/data/app.db
-      - SERVING_DUCKDB_PATH=/app/duckdb/serving.duckdb
+      - SERVING_DUCKDB_PATH=/app/duckdb/analytics.duckdb
     healthcheck:
       test: ["CMD", "curl", "-f", "http://localhost:5000/health"]
       interval: 30s

web/scripts/dev_run.sh

@@ -55,14 +55,14 @@ make css-build
 ok "CSS built"
 
 # -- Pipeline (first-time only) ----------------------------------------------
-# Runs extract → transform → export_serving from the repo root if serving.duckdb
+# Runs extract → transform → export_serving from the repo root if analytics.duckdb
 # does not exist yet. Subsequent dev_run.sh invocations skip this — delete
-# serving.duckdb from the repo root to force a full re-run.
+# analytics.duckdb from the repo root to force a full re-run.
 
 REPO_ROOT="$(cd .. && pwd)"
 PIPELINE_LANDING="$REPO_ROOT/data/landing"
 PIPELINE_DUCKDB="$REPO_ROOT/local.duckdb"
-PIPELINE_SERVING="$REPO_ROOT/serving.duckdb"
+PIPELINE_SERVING="$REPO_ROOT/analytics.duckdb"
 
 if [ ! -f "$PIPELINE_SERVING" ]; then
     info "First run — fetching and transforming data (this may take a few minutes)"