refactor(radio): chart-first restructure on hsmc 0.3 + soak hardening

Migrate from hsmc 0.2 (local-patched) to hsmc 0.3.0 (crates.io, with
embassy + trace-defmt features). Restructure radio chart and bundle
several adjacent stability changes that need to land together for
soak runs.

Radio chart:
- Booting (default, no handlers) -> Operational (default Unconfigured;
  super-state owning CmdPing/CmdGetInfo/Reset/WedgeDetected handlers
  + Recovering + CheckRecoveryBudget) -> Dead (terminal).
- Cold init's during is structurally un-cancellable.
- radio_task is a 30-line shim that panics if run() returns (chart is
  non-terminating).
- Internal queue capacity bumped 8 -> 32 to cover action-emit bursts.

Host chart:
- Connected splits into WaitingForFirstFrame (default, no timer) +
  Active (chart-owned 1s inactivity timer via on(after) + self-
  transition on FrameReceived). Manual Timer::after + last_frame_at
  removed.

Soak hardening:
- ld/nrf52840-memory.x: app start 0x1000 -> 0x26000 to leave the
  factory s140 SoftDevice dormant in flash.
- hal/nrf52840.rs: dump POWER.RESETREAS on boot -- WARN on DOG/LOCKUP,
  INFO on RESETPIN/SREQ/wake-from-OFF.
- host/usb.rs: read_packet errors discriminated -- Disabled is debug
  (normal during USB enum), BufferOverflow stays warn.
- COBS encode warns now carry type/tag/payload-length for diagnosis.
- RADIO_THROTTLED static initializes to true (no proof of host drain
  at boot).
- driver/sh1106.rs: init retries 3x with 100ms backoff (intermittent
  first-write race on power-up).
- Cargo.toml: unexpected_cfgs allowlist for hsmc's journal/trace-*
  features.

docs/semtech_lora_cad_lbt_guidebook.md: vendor the Semtech CAD/LBT
reference for offline lookup.

Cargo.lock

@@ -506,12 +506,12 @@ dependencies = [
 
 [[package]]
 name = "defmt-rtt"
-version = "1.1.0"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93d5a25c99d89c40f5676bec8cefe0614f17f0f40e916f98e345dae941807f9e"
+checksum = "c6eca0aae8aa2cf8333200ecbd236274697bc0a394765c858b3d9372eb1abcfa"
 dependencies = [
  "critical-section",
- "defmt 1.0.1",
+ "defmt 0.3.100",
 ]
 
 [[package]]
@@ -592,7 +592,7 @@ dependencies = [
  "cortex-m",
  "cortex-m-rt",
  "critical-section",
- "defmt 1.0.1",
+ "defmt 0.3.100",
  "defmt-rtt",
  "display-interface",
  "donglora-protocol",
@@ -1550,10 +1550,11 @@ checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
 
 [[package]]
 name = "hsmc"
-version = "0.2.0"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "960effec6ded897c013d5cde8fb7f09bf0137e783efc4c2e0346092a2941c46e"
+checksum = "ebed0d04633829a1e8319efcb038684dff8c01d06e4e50a4669691fb7c706f9e"
 dependencies = [
+ "defmt 0.3.100",
  "embassy-futures",
  "embassy-sync 0.8.0",
  "embassy-time",
@@ -1563,9 +1564,9 @@ dependencies = [
 
 [[package]]
 name = "hsmc-macros"
-version = "0.2.0"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3e1933eea1e95edb4fa03688f969f0a1ffabc4f16fc396b40ead6bedd5c4bdff"
+checksum = "e4de168c4459a45a99c71d51be8af79d94eb09ecd62d6f25baee6ec174297db2"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1574,9 +1575,9 @@ dependencies = [
 
 [[package]]
 name = "hybrid-array"
-version = "0.4.10"
+version = "0.4.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3944cf8cf766b40e2a1a333ee5e9b563f854d5fa49d6a8ca2764e97c6eddb214"
+checksum = "08d46837a0ed51fe95bd3b05de33cd64a1ee88fc797477ca48446872504507c5"
 dependencies = [
  "typenum",
 ]
@@ -1733,7 +1734,6 @@ dependencies = [
 [[package]]
 name = "lora-modulation"
 version = "0.1.5"
-source = "git+https://github.com/swaits/lora-rs.git?branch=fix%2Fsx126x-busy-race#f9ebb303a7029cbc3f19f0760ae164946000b152"
 dependencies = [
  "defmt 0.3.100",
 ]
@@ -1741,7 +1741,6 @@ dependencies = [
 [[package]]
 name = "lora-phy"
 version = "3.0.2-alpha"
-source = "git+https://github.com/swaits/lora-rs.git?branch=fix%2Fsx126x-busy-race#f9ebb303a7029cbc3f19f0760ae164946000b152"
 dependencies = [
  "defmt 0.3.100",
  "document-features",
@@ -1755,7 +1754,6 @@ dependencies = [
 [[package]]
 name = "lorawan"
 version = "0.9.1"
-source = "git+https://github.com/swaits/lora-rs.git?branch=fix%2Fsx126x-busy-race#f9ebb303a7029cbc3f19f0760ae164946000b152"
 dependencies = [
  "aes",
  "cmac",
@@ -1767,7 +1765,6 @@ dependencies = [
 [[package]]
 name = "lorawan-device"
 version = "0.12.2"
-source = "git+https://github.com/swaits/lora-rs.git?branch=fix%2Fsx126x-busy-race#f9ebb303a7029cbc3f19f0760ae164946000b152"
 dependencies = [
  "defmt 0.3.100",
  "document-features",
@@ -1782,7 +1779,6 @@ dependencies = [
 [[package]]
 name = "lorawan-macros"
 version = "0.1.0"
-source = "git+https://github.com/swaits/lora-rs.git?branch=fix%2Fsx126x-busy-race#f9ebb303a7029cbc3f19f0760ae164946000b152"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2747,9 +2743,9 @@ dependencies = [
 
 [[package]]
 name = "typenum"
-version = "1.19.0"
+version = "1.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "562d481066bde0658276a35467c4af00bdc6ee726305698a55b86e61d7ad82bb"
+checksum = "40ce102ab67701b8526c123c1bab5cbe42d7040ccfd0f64af1a385808d2f43de"
 
 [[package]]
 name = "ucobs"