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>

tests/smoke_test.py

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Bart Broere
 # SPDX-License-Identifier: GPL-3.0-or-later
-"""End-to-end smoke test for a running peo bridge, using the official Neo4j driver.
+"""End-to-end smoke test for a running boltage bridge, using the official Neo4j driver.
 
 Usage: python tests/smoke_test.py [bolt-uri] [user] [password]
 Requires: pip install neo4j
@@ -14,7 +14,7 @@ from neo4j.graph import Node, Path, Relationship
 uri = sys.argv[1] if len(sys.argv) > 1 else "neo4j://localhost:7687"
 user = sys.argv[2] if len(sys.argv) > 2 else "postgres"
 password = sys.argv[3] if len(sys.argv) > 3 else "postgres"
-GRAPH = "peo_smoke"
+GRAPH = "boltage_smoke"
 
 
 def check(label, condition):