fix(dell): match DPU HTTP boot option by name prefix, not exact equality

[kirson-git]

Problem

Dell::set_boot_order_dpu_first (src/dell.rs) builds the expected boot option name as
"HTTP Device 1: {DeviceDescription}" and compares it for exact equality against each
boot option's display_name:

if boot_option.display_name == expected_boot_option_name {

On Dell iDRAC the real boot option name has an adapter/MAC/protocol suffix appended, e.g.:

HTTP Device 1: NIC in Slot 40 Port 1 Partition 1 - Nvidia Network Adapter - C4:70:BD:2C:3C:0A - IPv4

So the exact == never matches, the loop falls through to
Err(RedfishError::MissingBootOption(..)), and the boot order is never set. Downstream
(NICo / infra-controller) this wedges the host-provisioning state machine at SetBootOrder
indefinitely.

Fix

Match by prefix — the constructed expected name is already a prefix of the real display_name:

if boot_option.display_name.starts_with(&expected_boot_option_name) {

The reorder action itself (PATCH Boot.BootOrder=[id]) is unchanged.

Testing / verification

Reproduced and verified on a live BlueField-3 + Dell PowerEdge XE9680 (iDRAC):

• Before: set_boot_order_dpu_first returned MissingBootOption("HTTP Device 1: NIC in Slot 40 Port 1 Partition 1") even though that boot option existed (Boot0000, with the suffix above) and was settable — confirmed by a manual PATCH .../Settings {"Boot":{"BootOrder":["Boot0000"]}} returning HTTP 200.
• After: the prefix match selects the correct boot option and sets it first; the host advances past SetBootOrder.

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[williampnvidia]

starts_with is too broad. For example, an expected Partition 1 can prefix-match Partition 10. Also this same in-line expression is used 3 times. I would use a matcher function like this:

fn boot_option_name_matches(expected: &str, actual: &str) -> bool {
    actual == expected
        || actual
            .strip_prefix(expected)
            .is_some_and(|suffix| suffix.starts_with(" - "))
}

[williampnvidia]

I would also add a unit test, something like this:

  #[test]
  fn boot_option_name_matches_legacy_and_extended_names() {
      let expected = "HTTP Device 1: NIC in Slot 4 Port 1 Partition 1";
      let cases = [
          (expected, true),
          (
              "HTTP Device 1: NIC in Slot 4 Port 1 Partition 1 - Nvidia Network Adapter - 00:11:22:33:44:55 - IPv4",
              true,
          ),
          (
              "HTTP Device 1: NIC in Slot 4 Port 1 Partition 10 - Nvidia Network Adapter - 00:11:22:33:44:55 - IPv4",
              false,
          ),
          (
              "HTTP Device 1: NIC in Slot 4 Port 2 Partition 1 - Nvidia Network Adapter - 00:11:22:33:44:55 - IPv4",
              false,
          ),
          (
              "HTTP Device 1: NIC in Slot 4 Port 1 Partition 1 unexpected suffix",
              false,
          ),
      ];

      for (actual, should_match) in cases {
          assert_eq!(
              boot_option_name_matches(expected, actual),
              should_match,
              "unexpected match result for {actual}"
          );
      }
  }

[williampnvidia]

Please replace the unrestricted prefix checks with the bounded boot_option_name_matches() helper discussed in the inline review, add the proposed regression test, and use the helper at all three modified call sites: machine_setup_status, set_boot_order_dpu_first, and is_boot_order_setup. This preserves support for both legacy and extended Dell boot-option names while preventing false matches such as Partition 1 matching Partition 10.