wip(ci): add self-hosted runner for IVC SNARK e2e test

Author: jpraynaud

.github/workflows/ci.yml

@@ -332,9 +332,11 @@ jobs:
           manifest-path: ${{ matrix.manifest-path }}
 
   e2e:
-    runs-on: ubuntu-24.04
+    name: e2e (${{ matrix.scenario.name }})
+    runs-on: ${{ matrix.scenario.runs_on }}
     needs: [build-ubuntu]
     # GitHub-hosted runners cap job execution at 6h; any higher value is not honored.
+    # The IvcSnark scenario runs on a self-hosted 16-core runner, which has no 6h cap.
     timeout-minutes: 360
     strategy:
       fail-fast: false
@@ -345,11 +347,13 @@ jobs:
         cardano_node_version: ["11.0.1"]
         hard_fork_latest_era_at_epoch: [0]
         run_id: ["#1"]
-        extra_args:
-          [
-            "--aggregate-signature-type=Concatenation full --check-client-cli-snapshot-converter",
-            "--aggregate-signature-type IvcSnark --cardano-slot-length 1.0 --cardano-epoch-length 2400  --mithril-run-interval 240000 minimal --signed-entity-type CardanoStakeDistribution",
-          ]
+        scenario:
+          - name: "concatenation-full"
+            runs_on: "ubuntu-24.04"
+            extra_args: "--aggregate-signature-type=Concatenation full --check-client-cli-snapshot-converter"
+          - name: "ivc-snark-minimal"
+            runs_on: ["self-hosted", "c2d-16", "ivc-snark"]
+            extra_args: "--aggregate-signature-type IvcSnark --cardano-slot-length 1.0 --cardano-epoch-length 1200 --mithril-run-interval 60000 minimal --signed-entity-type CardanoStakeDistribution"
 
     steps:
       - name: Checkout sources
@@ -393,7 +397,7 @@ jobs:
                     --devnet-scripts-directory=./mithril-test-lab/cardano-devnet \\
                     --mithril-era=${{ matrix.era }} \\
                     --cardano-node-version ${{ matrix.cardano_node_version }} \\
-                    --cardano-hard-fork-latest-era-at-epoch ${{ matrix.hard_fork_latest_era_at_epoch }} ${{ matrix.extra_args }} \\
+                    --cardano-hard-fork-latest-era-at-epoch ${{ matrix.hard_fork_latest_era_at_epoch }} ${{ matrix.scenario.extra_args }} \\
             EOF
             # If there is a next era, we need to specify it with '--mithril-next-era'
             if [[ "${{ matrix.next_era }}" != "" ]]; then