ci(repl): wire replication e2e suite into nextest profiles (backlog#1147 repl-1) (#4712)

Activate the 36 dormant replication e2e tests in
crates/e2e_test/src/replication_extension_test.rs (zero ran anywhere before).
Split via the ci-4 nextest profile mechanism, no hand-rolled cargo-test lane:

- PR smoke (profile.e2e-smoke, existing e2e-tests job): the 20 fast
  bucket-replication tests (target-registration / replication-check / list /
  remove / delete admin paths) that validate config synchronously and never
  wait for async convergence. Each spawns its own single-node rustfs server(s)
  on random ports with isolated temp dirs, so parallel-safe by construction
  (serial_test's #[serial] is a no-op under nextest's process-per-test model;
  no test-group needed).
- Nightly (profile.e2e-repl-nightly + .github/workflows/e2e-replication-nightly.yml):
  the remaining 16 = 6 slow data-plane tests + 9 _real_dual_node + 1
  _real_single_node. Defined as 'replication module MINUS the PR allowlist' so
  new replication tests default to nightly and are never silently unrun.

The nightly workflow builds the binary once, installs awscurl so the STS
dual-node test runs (skips gracefully with a visible log line otherwise), and
routes scheduled failures through .github/actions/schedule-failure-issue
(ci-8). Explicit division of labor with ci-5 e2e-full: these run only here.

Counts (cargo nextest list): e2e-smoke 83 (63 + 20), e2e-repl-nightly 16.
Docs updated: e2e-suite-inventory.md, e2e_test/README.md.

Refs backlog#1147 repl-1, backlog#1155.

crates/e2e_test/README.md

@@ -170,7 +170,8 @@ join CI through the nextest profile system only (never as ad-hoc jobs):
 | ILM / lifecycle (ignored) | `test-ilm-integration-serial` lane, `-j1` | **Active** (backlog#1148 ilm-1) |
 | KMS suite | — | Not in CI yet (backlog#1149 ci-5) |
 | Protocols (FTPS/WebDAV/SFTP) | — | Not in CI yet (backlog#1149 ci-7) |
-| Cluster / replication e2e | — | Not in CI yet (backlog#1147 repl-1) |
+| Replication (fast subset) | `e2e-smoke` profile, `e2e-tests` job, every PR | **Active** (backlog#1147 repl-1) |
+| Replication (slow + dual-node) | `e2e-repl-nightly` profile, scheduled workflow | **Active** (backlog#1147 repl-1) |
 | `reliant/*` (pre-started server) | — | Manual only |
 
 Links: [`ci.yml`](../../.github/workflows/ci.yml) `e2e-tests` (line 347),
@@ -185,8 +186,11 @@ and may add lanes; keep the table above easy to extend.
 **Reproduce a CI failure locally** — run the exact profile/lane:
 
 ```bash
-# Smoke (e2e-tests job)
+# Smoke (e2e-tests job) — includes the 20 fast replication tests
 cargo nextest run --profile e2e-smoke -p e2e_test
+# Replication nightly lane (16 slow + dual-node tests; install awscurl for the
+# STS dual-node test, else it skips gracefully)
+cargo nextest run --profile e2e-repl-nightly -p e2e_test
 # ILM serial lane
 cargo nextest run -j1 --run-ignored ignored-only -p rustfs-scanner -p rustfs \
   -E 'binary(lifecycle_integration_test) or (package(rustfs) and test(lifecycle_transition_api_test))'