[UNVERIFIED] Astra diagram pass

Architecture/IO_MODULES/IGNITION.md

@@ -14,13 +14,7 @@ confirmed.
 
 ## Power path
 
-```text
-VBAT_PROT --> coil primary --> VBG08H HVC
-                                 |
-                              internal IGBT
-                                 |
-                         PGND1 + PGND2 --> IGN_PGND --> power-entry ground
-```
+![Ignition power](../diagrams/ignition-power.svg)
 
 - `HVC` connects to one coil-primary terminal; the other terminal connects to
   `VBAT_PROT`.
@@ -37,23 +31,7 @@ VBAT_PROT --> coil primary --> VBG08H HVC
 `INP` is active high: a rising edge begins coil dwell and a falling edge
 causes the normal spark event.
 
-```text
-STM32 ignition timing output
-  --> 3.3 V-to-5 V non-inverting buffer --> 1 kOhm --> INP
-                                                     |
-                                              low-capacitance
-                                                Zener clamp
-                                                     |
-                                      VBG local Kelvin-ground reference
-
-SAFE_IGNITION_INHIBIT
-  --> 1 kOhm --> EN
-                  |
-           low-capacitance
-             Zener clamp
-                  |
-   VBG local Kelvin-ground reference
-```
+![Ignition command](../diagrams/ignition-command.svg)
 
 The VBG08H-E input-high requirement is 3 V. A 5 V buffer is used rather than
 direct STM32 drive to preserve high-level margin across MCU output tolerance,
@@ -91,9 +69,7 @@ and must not create a path that can pull `EN` low during a fault.
 internal threshold and releases when the current reaches the nominal 6.5 A
 threshold. The threshold is not externally programmable.
 
-```text
-VBG08H C.F. --> reference-style R/C filter and 3.3 V pull-up --> STM32 GPIO
-```
+![Ignition flag](../diagrams/ignition-flag.svg)
 
 The pull-up voltage must not exceed 5.5 V; `+3V3_MAIN` is suitable. The signal
 is a diagnostic confirmation of primary-current buildup and is not part of the
@@ -105,13 +81,7 @@ maximum dwell time.
 
 Define `IGN_PGND` as the ignition module's high-current return domain.
 
-```text
-PGND1 -- matched heavy copper --+
-                                +--> IGN_PGND local joining point --> power-entry ground
-PGND2 -- matched heavy copper --+
-                               |
-VBG08H GND -- short, separate Kelvin reference trace --+
-```
+![Ignition ground](../diagrams/ignition-ground.svg)
 
 - `PGND1` and `PGND2` must use equal-length, equal-width, and similarly
   shaped copper paths to the `IGN_PGND` joining point. The VBG08H-E uses these