feat: a bmc driver that takes the best of Redfish and IPMI (0.4.0)

bmc (napalm_redfish.bmc:BmcDriver) reads a BMC over Redfish where it
answers. A BMC that refuses Redfish (no license) is read and switched over
IPMI. A getter that fails over Redfish is asked over IPMI where IPMI has it;
IPMI is opened only then. Power control goes over Redfish when it answers,
and a refusal is final. The BMC is reset over Redfish only. Same account
for both; ipmi_port in optional_args.

Discovery suggests bmc for a BMC it finds: the fingerprint rules moved from
RedfishDriver to BmcDriver.

CHANGELOG.md

@@ -7,6 +7,24 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.4.0] - 2026-10-17
+
+### Added
+- `bmc` NAPALM driver (`napalm_redfish.bmc:BmcDriver`): the best of Redfish and IPMI for
+  one BMC, chosen by itself. It reads over Redfish where the BMC answers. A BMC that refuses
+  Redfish altogether (no license) is read and switched over IPMI, and a getter that fails
+  over Redfish is asked over IPMI where IPMI has it; IPMI is opened only then. Power control
+  goes over Redfish when it answers. A refusal by the BMC is not retried over IPMI. The BMC
+  itself is reset over Redfish only. `get_device_warnings` adds `ipmi_fallback` to
+  `bmc_license_required` while it reads over IPMI. `get_management_protocols` over IPMI
+  reports IPMI over LAN on, the one thing it knows. Same account for both; `ipmi_port`
+  (623) in `optional_args`.
+
+### Changed
+- Discovery suggests `bmc` for a BMC it finds: the fingerprint rules and the probed
+  `/redfish/v1/` path moved from `RedfishDriver` to `BmcDriver`
+  (`BMC_PORT_SPECS`, `BMC_HTTP_FINGERPRINT`). `redfish` stays for choosing by hand.
+
 ## [0.3.1] - 2026-10-17
 
 First run against real hardware over Redfish: a Supermicro X10DRL-i (BMC 3.91) with the