fix(e2e): source in statements, not in the backgrounded chain

Brought the stack up for real: '&' still bound the whole
'source && source && fault_manager' chain, so the gateway leg ran
unsourced and exited 127. Semicolons scope each '&' to one command.
Verified live: all three jobs up, two recordings seeded, specs' data
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Author: mfaferek93

e2e/docker-compose.rosbag.yml

@@ -49,8 +49,8 @@ services:
         # exits.
         command:
             - >
-                source /opt/ros/jazzy/setup.bash &&
-                source /home/medkit/ws/install/setup.bash &&
+                source /opt/ros/jazzy/setup.bash;
+                source /home/medkit/ws/install/setup.bash;
                 ros2 run ros2_medkit_fault_manager fault_manager_node
                 --ros-args --params-file /e2e/params.yaml &
                 FM=$!;