chore: backup session 2026-06-01 final — snapshot, resume, TODO, all fixes documented

snapshots/2026-06-01-full-snapshot.json

@@ -0,0 +1,21 @@
+{
+  "date": "2026-06-01",
+  "containers_total": 75,
+  "status": "All major services UP",
+  "fixes_this_session": [
+    "Kafka: KAFKA_CFG_* → KAFKA_* env vars, CLUSTER_ID added, volumes recreated",
+    "Trino: node.properties created, plugin.bundles removed",
+    "JupyterHub: LocalProcessSpawner (not Simple), bcrypt passwords, OS users created"
+  ],
+  "jupyterhub_creds": {
+    "admin": "Digitribe972",
+    "eric": "Digitribe972",
+    "erol": "erol"
+  },
+  "issues_resolved": [
+    "Kafka restart loop (Bitnami env vars on apache/kafka image)",
+    "Trino restart loop (missing node.properties, invalid node.id)",
+    "JupyterHub 500 on login (SimpleLocalProcessSpawner JUPYTERHUB_SERVICE_URL bug)",
+    "JupyterHub spawn timeout (missing OS users, wrong password hash format)"
+  ]
+}