Flakiness in e2e tests in CI

[jpraynaud]

Why

We have noticed some flakiness in the e2e tests in the CI which fails quite often.

Minimum expected mithril stake distribution epoch not reached : XX < YY

• https://github.com/input-output-hk/mithril/actions/runs/12159186537/job/33909010778
• https://github.com/input-output-hk/mithril/actions/runs/12159406584/job/33910097011#step:6:589
• https://github.com/input-output-hk/mithril/actions/runs/12398254570/job/34610766498#step:6:661
• https://github.com/input-output-hk/mithril/actions/runs/12398387893/job/34611232337#step:6:665
• https://github.com/input-output-hk/mithril/actions/runs/12398387893/job/34612511048#step:6:948
• https://github.com/input-output-hk/mithril/actions/runs/12668778598/job/35305158660#step:6:276
• https://github.com/input-output-hk/mithril/actions/runs/12706153806/job/35419162536#step:6:420
• https://github.com/input-output-hk/mithril/actions/runs/12751941085/job/35540460712#step:6:513
• https://github.com/input-output-hk/mithril/actions/runs/12752388690/job/35542004023#step:6:402
• https://github.com/input-output-hk/mithril/actions/runs/12764751348/job/35577771541#step:6:329
• https://github.com/input-output-hk/mithril/actions/runs/12793153128/job/35665568667#step:6:369
• https://github.com/input-output-hk/mithril/actions/runs/12873215847/job/35890464988#step:6:608
• https://github.com/input-output-hk/mithril/actions/runs/12873247216/job/35890553161#step:6:867

mithril-aggregator genesis bootstrap exited with code: 1

• https://github.com/input-output-hk/mithril/actions/runs/12140713467/job/33851741099#step:6:991
• https://github.com/input-output-hk/mithril/actions/runs/12178789405/job/33970064206#step:6:533
• https://github.com/input-output-hk/mithril/actions/runs/12231609594/job/34115506322#step:6:583
• https://github.com/input-output-hk/mithril/actions/runs/12871164504/job/35884122045#step:6:548
• https://github.com/input-output-hk/mithril/actions/runs/12873215847/job/35890464322#step:6:552
• https://github.com/input-output-hk/mithril/actions/runs/12906035647/job/35986780846#step:6:554

What

Investigate the sources of flakiness and fix them.

How

• Investigate the sources of flakiness:
  • TBD
• Fix the sources of flakiness