Fix conf_upgrade template naming bugs that caused false ADDED/REMOVED on every nightly pull

- REMOTE_ID_TIER*_DELAY renamed to HOSTN_TIER*_DELAY — these are own-host outage timers
- HOSTN_RADARR_MOVIE_ROOT → HOSTN_RADARR_MOVIES_ROOT (matches common.sh)
- HOSTN_SYS_WATCHDOG_CHECK_DOCKER → CHECK_DOCKER_DAEMON, CHECK_TEMP → CHECK_CPU_TEMP
- Add REMOTE_ID substitution to the sed in git_pull_execute.sh so COVERS_REMOTE_ID
  resolves to the actual remote host (e.g. FALLBACK_HOST1_COVERS_HOST2_TIER1)
- Add HOSTN_PARTNERSHIP_REPLACE_CONTAINERS, HOSTN_PARTNERSHIP_ARR_REPLACE_CONTAINERS,
  and HOSTN_WATCHDOG_CONTAINER_API_CHECKS to template so they aren't removed each pull

Configurations/host.conf.template

@@ -160,6 +160,14 @@
         # "Emby"
     )
 
+# Containers stopped on THIS server before deploying the mirror's stack on onboard.
+    HOSTN_PARTNERSHIP_REPLACE_CONTAINERS=(
+    )
+
+# Arr containers stopped on this server when mirror's arr stack is deployed.
+    HOSTN_PARTNERSHIP_ARR_REPLACE_CONTAINERS=(
+    )
+
 # Emby admin provisioning — owner controls whether Emby is shared.
     HOSTN_PARTNERSHIP_PROVISION_EMBY_ADMIN=false
     HOSTN_PARTNERSHIP_EMBY_PORT=8096
@@ -259,12 +267,11 @@
         # "container-placeholder"
     )
 
-# ━━━ Tier Delays — Partner's Containers on this Host ━━━
-# How long the partner must be down before each tier activates here — in minutes.
-# Replace REMOTE_ID with the actual remote host ID (HOST1, HOST2, etc.)
-    REMOTE_ID_TIER2_DELAY=240           # 4 hours
-    REMOTE_ID_TIER3_DELAY=720           # 12 hours
-    REMOTE_ID_TIER4_DELAY=1440          # 24 hours
+# ━━━ Tier Delays — This Host's Outage Timers ━━━
+# How long THIS host must be down before each tier activates on the partner.
+    HOSTN_TIER2_DELAY=240           # 4 hours
+    HOSTN_TIER3_DELAY=720           # 12 hours
+    HOSTN_TIER4_DELAY=1440          # 24 hours
 
 # ━━━ Rsync Writeback ━━━
     HOSTN_TIER1_WRITEBACK_DELAY=60      # skip Emby writeback if outage under 1hr
@@ -314,6 +321,10 @@
         # ["Emby"]="http://localhost:8096"
     )
 
+# API-level health checks. Format: ["ContainerName"]="url|expected_json_key|expected_value"
+    declare -A HOSTN_WATCHDOG_CONTAINER_API_CHECKS=(
+    )
+
 # Required containers — must always be running.
     HOSTN_WATCHDOG_REQUIRED_CONTAINERS=(
         # "NginxProxyManager"
@@ -412,7 +423,7 @@
     HOSTN_RADARR_URL="http://localhost:7878"
     HOSTN_RADARR_API_KEY=""
     HOSTN_TMDB_API_KEY=""
-    HOSTN_RADARR_MOVIE_ROOT="/mnt/user/Movies"
+    HOSTN_RADARR_MOVIES_ROOT="/mnt/user/Movies"
 
     declare -A HOSTN_RADARR_PATH_MAP=(
         # ["/movies"]="/mnt/user/Movies"
@@ -474,7 +485,7 @@
 
     HOSTN_SYS_WATCHDOG_NIC=""   # e.g. eth0 — for network monitoring
 
-    HOSTN_SYS_WATCHDOG_CHECK_DOCKER=true
+    HOSTN_SYS_WATCHDOG_CHECK_DOCKER_DAEMON=true
     HOSTN_SYS_WATCHDOG_CHECK_ROOTFS=true
     HOSTN_SYS_WATCHDOG_CHECK_KERNEL_OOPS=true
     HOSTN_SYS_WATCHDOG_CHECK_FD=true
@@ -483,7 +494,7 @@
     HOSTN_SYS_WATCHDOG_CHECK_RAM=true
     HOSTN_SYS_WATCHDOG_CHECK_LOG=true
     HOSTN_SYS_WATCHDOG_CHECK_ARC=true
-    HOSTN_SYS_WATCHDOG_CHECK_TEMP=true
+    HOSTN_SYS_WATCHDOG_CHECK_CPU_TEMP=true
     HOSTN_SYS_WATCHDOG_CHECK_LOAD=true
     HOSTN_SYS_WATCHDOG_CHECK_ZOMBIES=true
     HOSTN_SYS_WATCHDOG_CHECK_CONTAINERS=true