fix: avoid eager default interpolation

Signed-off-by: seekskyworld <djh1813553759@gmail.com>

Allow importing compose file to override resource definition

Signed-off-by: Nicolas De Loof <nicolas.deloof@gmail.com>

feat(volume): Enhance volume parsing to support variable default values

Signed-off-by: Suleiman Dibirov <idsulik@gmail.com>

make x-initialSync part of the spec as initial_sync attribute

Signed-off-by: Guillaume Lours <705411+glours@users.noreply.github.com>