Fix all 8 firmware bugs with regression tests

Bugs fixed in adf4382a_manager.c:
- Bug #1: Move initialized=true before sync setup, propagate sync failure
- Bug #3: Implement TriggerTimedSync with sw_sync pulse (was no-op)
- Bug #5: Replace GPIO-only placeholder with TIM3 PWM for DELADJ
- Bug #7: Correct GPIOG pin definitions to match CubeMX (pins 6-15)

Bugs fixed in main.cpp:
- Bug #2: Remove pre-reset ad9523_setup() call (keep only post-reset)
- Bug #4: Move init error check before phase shift calls
- Bug #6: Fix timer variable (last_check -> last_check1) in temp block
- Bug #8: Uncomment uart_print/uart_println debug helpers

Test harness updates:
- All 8 tests rewritten to assert correct post-fix behavior
- Added TIM PWM mock (SPY_TIM_PWM_START/STOP/SET_COMPARE)
- Added mock_adf4382_set_timed_sync_retval for failure injection
- Updated shims and Makefile for new test dependencies
- All 8 tests pass: make clean && make test -> 8/8 passed

9_Firmware/9_1_Microcontroller/tests/stm32_hal_mock.c

@@ -21,6 +21,7 @@ I2C_HandleTypeDef  hi2c1 = { .id = 1 };
 I2C_HandleTypeDef  hi2c2 = { .id = 2 };
 UART_HandleTypeDef huart3 = { .id = 3 };
 ADC_HandleTypeDef  hadc3 = { .id = 3 };
+TIM_HandleTypeDef  htim3 = { .id = 3 };
 
 /* ========================= Spy log ================================ */
 SpyRecord spy_log[SPY_MAX_RECORDS];
@@ -224,3 +225,40 @@ uint8_t ADS7830_Measure_SingleEnded(ADC_HandleTypeDef *hadc, uint8_t channel)
     });
     return 100;
 }
+
+/* ========================= TIM PWM stubs ========================== */
+
+HAL_StatusTypeDef HAL_TIM_PWM_Start(TIM_HandleTypeDef *htim, uint32_t Channel)
+{
+    spy_push((SpyRecord){
+        .type  = SPY_TIM_PWM_START,
+        .port  = NULL,
+        .pin   = (uint16_t)Channel,
+        .value = htim->id,
+        .extra = htim
+    });
+    return HAL_OK;
+}
+
+HAL_StatusTypeDef HAL_TIM_PWM_Stop(TIM_HandleTypeDef *htim, uint32_t Channel)
+{
+    spy_push((SpyRecord){
+        .type  = SPY_TIM_PWM_STOP,
+        .port  = NULL,
+        .pin   = (uint16_t)Channel,
+        .value = htim->id,
+        .extra = htim
+    });
+    return HAL_OK;
+}
+
+void mock_tim_set_compare(TIM_HandleTypeDef *htim, uint32_t Channel, uint32_t Compare)
+{
+    spy_push((SpyRecord){
+        .type  = SPY_TIM_SET_COMPARE,
+        .port  = NULL,
+        .pin   = (uint16_t)Channel,
+        .value = Compare,
+        .extra = htim
+    });
+}