test(e2e): token-auth sync roundtrip with gateway-minted token

[andinux]

Summary

• Add test_token_auth to the e2e suite: the token authentication path (cloudsync_network_set_token) previously had no automated coverage — only the apikey path was tested end-to-end.
• The test mints a user token from the weblite gateway (POST /v2/tokens, authenticated with INTEGRATION_TEST_APIKEY as Bearer) via the curl CLI, since the test binary is built without networking. It always uses the same obviously-synthetic userId (e2e7e57e-0000-4000-8000-000000000001), a 24h expiresAt so repeated runs don't leave live credentials behind, and no attributes.
• It then runs the same sync roundtrip as the Init+Sync test, authenticated with the minted token instead of the apikey, asserting cloudsync_network_sync receives rows.
• Skips cleanly (like the chunked group) when INTEGRATION_TEST_WEBLITE_ADDRESS is not set.
• integration_network_init is split into a base (address/init) + apikey wrapper so the token test reuses the init logic; existing tests unchanged.
• CI: main.yml passes INTEGRATION_TEST_WEBLITE_ADDRESS through the job env, the arm64 docker container, and the Android emulator script. The INTEGRATION_TEST_WEBLITE_ADDRESS repo secret must be added for the test to run in CI; until then it reports SKIPPED.

Testing

• Manual token roundtrip via the CLI passed 7/7 consecutive runs with freshly minted tokens (after the server-side follower fix).
• make e2e: Token Auth Test OK on every run. Note: Chunked Capped Receive currently fails on unmodified main as well (pre-existing, unrelated to this branch).

🤖 Generated with Claude Code