Platform-agnostic refactor: eliminate OS-specific hardcodes from core scripts

All bash scripts are now platform-neutral. Unraid-specific paths, commands,
and service checks moved to Plugin/unraid/adapter.sh. Core scripts call
platform_*() functions exclusively — no direct OS paths in runtime logic.

New adapter functions: platform_storage_path, platform_webui_install_path,
platform_scripts_dir_probe_cmd, platform_setup_db_path, platform_storage_healthy,
platform_is_service_enabled, platform_get_temp_thresholds, platform_disk_states_path,
platform_rebuild_container, platform_push_conf, platform_push_setup_state,
platform_get_templates_dir, platform_send_os_notification.

Partnership services stack (Emby/Jellyfin/Seerr/SeerrFin) added as third
onboarding stack alongside auth and arr stacks.

Tools/bulk_permissions_repair.sh

@@ -98,10 +98,6 @@ fi
 
 acquire_lock
 
-platform_require_cmd \
-    "/usr/local/emhttp/plugins/dynamix/scripts/notify" \
-    "" "" \
-    "unRAID notify script" || warn "unRAID notify script not found — native notifications disabled"
 
 # detect_hosts() sets MY_ID — used in summary
 detect_hosts

Tools/container_data_export.sh

@@ -93,10 +93,6 @@ if ! command -v docker &>/dev/null; then
     exit 1
 fi
 
-platform_require_cmd \
-    "/usr/local/emhttp/plugins/dynamix/scripts/notify" \
-    "" "" \
-    "unRAID notify script" || warn "unRAID notify script not found — native notifications disabled"
 
 # detect_hosts() sets MY_ID — used in summary
 detect_hosts

Tools/emby_database_repair.sh

@@ -101,10 +101,6 @@ platform_require_cmd \
     "--version" "." \
     "sqlite3" || { error "sqlite3 not found — install sqlite package"; exit 1; }
 
-platform_require_cmd \
-    "/usr/local/emhttp/plugins/dynamix/scripts/notify" \
-    "" "" \
-    "unRAID notify script" || warn "unRAID notify script not found — native notifications disabled"
 
 if ! command -v jq >/dev/null 2>&1; then
     error "jq not found — required to detect Emby config path from Docker mounts"

Tools/fallback_state_reset.sh

@@ -88,10 +88,6 @@ if [[ "$EUID" -ne 0 ]]; then
     exit 1
 fi
 
-platform_require_cmd \
-    "/usr/local/emhttp/plugins/dynamix/scripts/notify" \
-    "" "" \
-    "unRAID notify script" || warn "unRAID notify script not found — native notifications disabled"
 
 acquire_lock
 

Tools/ramdisk_stop.sh

@@ -101,10 +101,6 @@ if [[ "$EUID" -ne 0 ]]; then
     exit 1
 fi
 
-platform_require_cmd \
-    "/usr/local/emhttp/plugins/dynamix/scripts/notify" \
-    "" "" \
-    "unRAID notify script" || warn "unRAID notify script not found — native notifications disabled"
 
 acquire_lock
 

Tools/smart_long_test.sh

@@ -112,10 +112,6 @@ platform_require_cmd \
         exit 1
     }
 
-platform_require_cmd \
-    "/usr/local/emhttp/plugins/dynamix/scripts/notify" \
-    "" "" \
-    "unRAID notify script" || warn "unRAID notify script not found — native notifications disabled"
 
 acquire_lock
 

Tools/watchdog_skip_list_manager.sh

@@ -109,10 +109,6 @@ if [[ "$EUID" -ne 0 ]]; then
     exit 1
 fi
 
-platform_require_cmd \
-    "/usr/local/emhttp/plugins/dynamix/scripts/notify" \
-    "" "" \
-    "unRAID notify script" || warn "unRAID notify script not found — native notifications disabled"
 
 acquire_lock
 

Tools/zfs_pool_scrub.sh

@@ -103,10 +103,6 @@ platform_require_cmd \
         exit 1
     }
 
-platform_require_cmd \
-    "/usr/local/emhttp/plugins/dynamix/scripts/notify" \
-    "" "" \
-    "unRAID notify script" || warn "unRAID notify script not found — native notifications disabled"
 
 acquire_lock