[MEM] Enable PSRAM on Theengs Bridge v1.1 (ESP32-WROVER-IE) (#2303)

- Switch Ethernet RMII clock from GPIO16 to GPIO0 output mode,
  freeing GPIO16 for PSRAM chip select (SPICS1) on WROVER-IE
- Enable PSRAM with QIO flash mode and cache workaround flags
- Add PHY pre-power support for ETH_CLOCK_GPIO0_IN mode
- Report PSRAM status and free memory in SYS MQTT topic

Requires Theengs lib-builder update: remove LIBTIME from IRAM
cache workaround (CONFIG_SPIRAM_CACHE_LIBTIME_IN_IRAM=n) to
free ~3.5KB IRAM for the -mfix-esp32-psram-cache-issue flag.

Tested on Theengs Bridge v1.1: 4MB PSRAM detected, Ethernet
100Mbps on GPIO0, BLE scanning nominal.

Co-authored-by: Florian <1technophile@users.noreply.github.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

environments.ini

@@ -53,6 +53,7 @@ custom_hardware = RFBridge v1
 platform = ${com.esp32_platform}
 platform_packages = ${com.esp32_platform_packages}
 board = esp32dev
+board_build.flash_mode = qio
 board_build.partitions = min_spiffs.csv
 lib_deps =
   ${com-esp32.lib_deps}
@@ -70,7 +71,7 @@ build_flags =
   '-DETH_PHY_POWER=5'
   '-DETH_PHY_MDC=23'
   '-DETH_PHY_MDIO=18'
-  '-DETH_CLK_MODE=ETH_CLOCK_GPIO16_OUT'
+  '-DETH_CLK_MODE=ETH_CLOCK_GPIO0_OUT'
   '-DLED_ADDRESSABLE_PIN1=32'
   '-DLED_ADDRESSABLE_NUM=4'
   '-DLED_BROKER=0'
@@ -82,8 +83,9 @@ build_flags =
   '-DUSE_MAC_AS_GATEWAY_NAME'
   '-DGATEWAY_MANUFACTURER="Theengs"'
   '-DGATEWAY_MODEL="TBRIDGE01"'
-  ;'-DBOARD_HAS_PSRAM'
-  ;'-mfix-esp32-psram-cache-issue'
+  '-DBOARD_HAS_PSRAM'
+  '-mfix-esp32-psram-cache-issue'
+  '-mfix-esp32-psram-cache-strategy=memw'
 custom_description = 'BLE gateway with external antenna and Ethernet/WiFi connectivity, <a href="https://tbridge01.theengs.io/" target="_blank">user guide</a>'
 custom_hardware = Theengs Bridge gateway ethernet
 
@@ -91,6 +93,7 @@ custom_hardware = Theengs Bridge gateway ethernet
 platform = ${com.esp32_platform}
 platform_packages = ${com.esp32_platform_packages}
 board = esp32dev
+board_build.flash_mode = qio
 board_build.partitions = min_spiffs.csv
 lib_deps =
   ${com-esp32.lib_deps}
@@ -106,7 +109,7 @@ build_flags =
   '-DETH_PHY_POWER=5'
   '-DETH_PHY_MDC=23'
   '-DETH_PHY_MDIO=18'
-  '-DETH_CLK_MODE=ETH_CLOCK_GPIO16_OUT'
+  '-DETH_CLK_MODE=ETH_CLOCK_GPIO0_OUT'
   '-DLED_ADDRESSABLE=true'
   '-DLED_ADDRESSABLE_PIN1=32'
   '-DLED_ADDRESSABLE_NUM=4'
@@ -120,9 +123,10 @@ build_flags =
   '-DUSE_MAC_AS_GATEWAY_NAME'
   '-DGATEWAY_MANUFACTURER="Theengs"'
   '-DGATEWAY_MODEL="TBRIDGE02"'
-  ;'-DBOARD_HAS_PSRAM'
+  '-DBOARD_HAS_PSRAM'
+  '-mfix-esp32-psram-cache-issue'
+  '-mfix-esp32-psram-cache-strategy=memw'
   ;'-DSELF_TEST=true'
-  ;'-mfix-esp32-psram-cache-issue'
 custom_description = 'BLE gateway with external antenna and Ethernet/WiFi connectivity, <a href="https://tbridge02.theengs.io/" target="_blank">user guide</a>'
 custom_hardware = Theengs Bridge gateway ethernet
 custom_img = img/Theengs-Bridge-ble-gateway.png