fix(deps): pin lora-phy to swaits/lora-rs#fixed for sx127x/sx126x reliability

Switch lora-phy from crates.io to the swaits/lora-rs "fixed" branch
which carries three fixes awaiting upstream PR acceptance:

  - phy: sx127x: clear stale IRQ flags before reconfiguring DIO mapping
    in set_irq_params (fix/sx127x-irq-clear-position)
  - phy: sx127x: clear stale IRQ flags in do_rx before mode change
    (fix/sx127x-rx-irq-clear)
  - phy: sx126x: pre-command BUSY check + standby/IRQ-clear hygiene
    around CAD (fix/sx126x-busy-race)

Validates TBeam classic (sx127x) in particular and tightens reliability
across every board (the sx126x BUSY-race fix lands on every nRF/RP2040
board too). Pinned to commit e8a52ebd via Cargo.lock; revert to
crates.io once the three PRs land upstream.

Cargo.lock

@@ -1734,6 +1734,7 @@ dependencies = [
 [[package]]
 name = "lora-modulation"
 version = "0.1.5"
+source = "git+https://github.com/swaits/lora-rs.git?branch=fixed#e8a52ebd35352ce0267148fd392a0b1956d7735f"
 dependencies = [
  "defmt 0.3.100",
 ]
@@ -1741,6 +1742,7 @@ dependencies = [
 [[package]]
 name = "lora-phy"
 version = "3.0.2-alpha"
+source = "git+https://github.com/swaits/lora-rs.git?branch=fixed#e8a52ebd35352ce0267148fd392a0b1956d7735f"
 dependencies = [
  "defmt 0.3.100",
  "document-features",
@@ -1754,6 +1756,7 @@ dependencies = [
 [[package]]
 name = "lorawan"
 version = "0.9.1"
+source = "git+https://github.com/swaits/lora-rs.git?branch=fixed#e8a52ebd35352ce0267148fd392a0b1956d7735f"
 dependencies = [
  "aes",
  "cmac",
@@ -1765,6 +1768,7 @@ dependencies = [
 [[package]]
 name = "lorawan-device"
 version = "0.12.2"
+source = "git+https://github.com/swaits/lora-rs.git?branch=fixed#e8a52ebd35352ce0267148fd392a0b1956d7735f"
 dependencies = [
  "defmt 0.3.100",
  "document-features",
@@ -1779,6 +1783,7 @@ dependencies = [
 [[package]]
 name = "lorawan-macros"
 version = "0.1.0"
+source = "git+https://github.com/swaits/lora-rs.git?branch=fixed#e8a52ebd35352ce0267148fd392a0b1956d7735f"
 dependencies = [
  "proc-macro2",
  "quote",