Rename the project from peo to boltage

The name peo cannot be registered on PyPI. Rename the package, the
command, the PEO_* environment variables (now BOLTAGE_*), the container
paths and scripts, and the source URLs.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

compose.yaml

@@ -1,14 +1,14 @@
 # SPDX-FileCopyrightText: 2026 Bart Broere
 # SPDX-License-Identifier: GPL-3.0-or-later
 #
-# peo, PostgreSQL with Apache AGE and pgAdmin as separate containers. peo runs
+# boltage, PostgreSQL with Apache AGE and pgAdmin as separate containers. boltage runs
 # from the slim image (see Containerfile). Start with:
 #
 #   POSTGRES_PASSWORD=secret podman compose up -d
 #
 # or put POSTGRES_PASSWORD in a .env file next to this one.
 
-name: peo
+name: boltage
 
 services:
   postgres:
@@ -16,13 +16,13 @@ services:
     command: ["postgres", "-c", "shared_preload_libraries=age"]
     environment:
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:?Set POSTGRES_PASSWORD, for example in a .env file}
-      PEO_DEFAULT_GRAPH: ${PEO_DEFAULT_GRAPH:-neo4j}
+      BOLTAGE_DEFAULT_GRAPH: ${BOLTAGE_DEFAULT_GRAPH:-neo4j}
     volumes:
       - postgres-data:/var/lib/postgresql
       # Creates the default graph when the database is initialised.
-      - ./container/initdb/10-peo.sh:/docker-entrypoint-initdb.d/10-peo.sh:ro
+      - ./container/initdb/10-boltage.sh:/docker-entrypoint-initdb.d/10-boltage.sh:ro
     ports:
-      - "${PEO_POSTGRES_PORT:-5432}:5432"
+      - "${BOLTAGE_POSTGRES_PORT:-5432}:5432"
     healthcheck:
       # Over TCP, so the temporary server that runs the init scripts does not count.
       test: ["CMD", "pg_isready", "--host", "127.0.0.1", "--username", "postgres"]
@@ -30,17 +30,17 @@ services:
       timeout: 5s
       retries: 20
 
-  peo:
+  boltage:
     build:
       context: .
       dockerfile: Containerfile
       target: slim
-    image: localhost/peo:slim
+    image: localhost/boltage:slim
     environment:
-      PEO_PG_HOST: postgres
-      PEO_PG_DATABASE: postgres
-      PEO_DEFAULT_GRAPH: ${PEO_DEFAULT_GRAPH:-neo4j}
-      PEO_LOG_LEVEL: ${PEO_LOG_LEVEL:-INFO}
+      BOLTAGE_PG_HOST: postgres
+      BOLTAGE_PG_DATABASE: postgres
+      BOLTAGE_DEFAULT_GRAPH: ${BOLTAGE_DEFAULT_GRAPH:-neo4j}
+      BOLTAGE_LOG_LEVEL: ${BOLTAGE_LOG_LEVEL:-INFO}
     ports:
       - "7474:7474"
       - "7687:7687"