fix: Small overpass processing issues for surfaces

[JulesL2]

Description

2 issues has been discovered:

• When uploading tracks, I had often a warning that not all inner geometries found an outer, this was not supposed to happen and happened when multiple outer geoms exists, the variables that stores the failed inner was not well actualised.
• When getting the inner and outer members of a relation, if there is a relation in the members, the reccursive function should inverse the role (the outer of an inner becomes an inner and the inner of an inner becomes an outer). I fix the first half, the second half need more work, a TODO mark is there.
• Removed a warning that should never be touched thanks to improvement in the merging algorithm perf: Enhance and fix merging algorithm #76. However keep the condition to avoid a possible infinite reccursion in a unexpected situtation