[autodev] fix Tier-1 e2e docker harness drift

Bugs found during Step 11 (Run Tests) functional gate:

1. e2e/docker/docker-compose.test.yml referenced docker/Dockerfile
   (doesn't exist). Renamed to docker/companion-tier1.Dockerfile.

2. fdr-output volume declared tmpfs size=64g, which requires actual host
   RAM. Docker Desktop on macOS has only ~3.8 GiB; tmpfs alloc fails.
   Switched to a plain named volume (the SUT enforces the 64 GB cap
   internally per NFT-LIM-02; the volume-layer cap was belt-and-
   suspenders only). Documented the overlay2+xfs override path for CI
   runners that support it.

3. Added e2e-results/ to .gitignore (runtime output dir created by
   the bind-mount).

These bugs predate this session; the harness had never been bench-tested
end-to-end. Surfacing them was the actual outcome of running test-run.

Co-authored-by: Cursor <cursoragent@cursor.com>

.gitignore

@@ -57,6 +57,7 @@ Thumbs.db
 /var/lib/gps-denied/
 fdr_output/
 tile_cache/
+e2e-results/
 
 # Secrets
 .env

e2e/docker/docker-compose.test.yml

@@ -16,7 +16,7 @@ services:
   gps-denied-onboard:
     build:
       context: ../..
-      dockerfile: docker/Dockerfile
+      dockerfile: docker/companion-tier1.Dockerfile
       args:
         BUILD_VINS_MONO: "OFF"
     image: gps-denied-onboard:e2e
@@ -126,14 +126,12 @@ networks:
 volumes:
   # Size cap follows AC-NEW-3: each FDR file ≤ 64 GB. The volume layer cap is
   # belt-and-suspenders; the SUT enforces the cap internally per NFT-LIM-02.
-  # `--storage-opt size=64g` requires overlay2 with xfs backing on the host; CI
-  # YAML notes the fallback for CI runners that lack that driver combination.
-  fdr-output:
-    driver: local
-    driver_opts:
-      type: tmpfs
-      device: tmpfs
-      o: "size=64g"
+  # `--storage-opt size=64g` requires overlay2 with xfs backing on the host —
+  # most CI runners and macOS Docker Desktop hosts lack that combination, so
+  # this base file uses the documented fallback (a plain named volume) and
+  # relies on the SUT-internal cap. CI runners with overlay2+xfs can override
+  # via a docker-compose.override.yml that re-introduces the tmpfs driver_opts.
+  fdr-output: {}
   tile-cache-fixture: {}
   tlog-output: {}
   mock-audit: {}