Align dev container Instant Client TZ data with Oracle server

gvenzl/oracle-free:latest and the bundled Instant Client can drift to
different TZ data versions between releases, raising ORA-01805 on every
TIMESTAMP WITH TIME ZONE operation. Mirror PR rsim#2734's CI workaround for
the dev container: copy the server's timezlrg_*.dat into the client's
oracore/zoneinfo and point ORA_TZFILE at it.

Adds the docker-outside-of-docker feature plus a docker.sock bind mount
on the app service so the dev container can run docker exec / docker cp
against the sibling oracle service.

Author: yahonda

.devcontainer/devcontainer.json

@@ -6,7 +6,8 @@
   "features": {
     "ghcr.io/rails/devcontainer/features/ruby:2": {
       "version": "4.0.4"
-    }
+    },
+    "ghcr.io/devcontainers/features/docker-outside-of-docker:1": {}
   },
   "customizations": {
     "vscode": {

.devcontainer/docker-compose.yml

@@ -5,6 +5,7 @@ services:
       dockerfile: Dockerfile
     volumes:
       - ../..:/workspaces:cached
+      - /var/run/docker.sock:/var/run/docker.sock
     command: sleep infinity
     network_mode: service:oracle
 

.devcontainer/postCreateCommand.sh

@@ -20,6 +20,22 @@ if [ "$oracle_ready" != "true" ]; then
   exit 1
 fi
 
+# Match Instant Client TZ data to the Oracle server's to avoid ORA-01805.
+echo "Aligning Instant Client TZ data with Oracle server..."
+ORACLE_CONTAINER=$(docker ps --filter "ancestor=gvenzl/oracle-free" -q | head -1)
+if [ -z "$ORACLE_CONTAINER" ]; then
+  echo "Could not locate gvenzl/oracle-free container; skipping TZ alignment." >&2
+else
+  SRC=$(docker exec "$ORACLE_CONTAINER" bash -c 'ls $ORACLE_HOME/oracore/zoneinfo/timezlrg_*.dat 2>/dev/null | head -1')
+  echo "Server TZ file: $SRC"
+  DST_DIR="$ORACLE_HOME/oracore/zoneinfo"
+  sudo mkdir -p "$DST_DIR"
+  docker cp "$ORACLE_CONTAINER":"$SRC" /tmp/_server_tzfile.dat
+  sudo mv /tmp/_server_tzfile.dat "$DST_DIR/$(basename "$SRC")"
+  ls -l "$DST_DIR"
+  echo "export ORA_TZFILE=$DST_DIR/$(basename "$SRC")" | sudo tee /etc/profile.d/ora-tzfile.sh > /dev/null
+fi
+
 ci/setup_accounts.sh
 
 echo "Dev container setup complete. You are ready to start developing the Oracle Enhanced adapter!"