Docs: expand developer/debugging and tools references

Add extensive documentation and examples across contribution, guides, templates and tools references. Key changes:
- Introduce a Developer Mode & Debugging section (dev_mode flags: trace, keep, pause, breakpoint, logs, dryrun, motd) in CONTRIBUTING.md with usage example.
- Provide a standard update_script() pattern and BookStack example in GUIDE.md to clarify update flow (stop services, backup, deploy, restore, migrate, restart).
- Add new helper entries (BookLore, KaraKeep) and advanced repository helpers (setup_deb822_repo, prepare_repository_setup, cleanup_tool_keyrings) plus utilities (setup_meilisearch, verify_tool_version) in HELPER_FUNCTIONS.md.
- Update install template to suggest PNPM, Java 21 and Meilisearch; update example DB setup notes in AppName-install.sh.
- Add var_diagnostics option and switch var_fuse to boolean/toggle wording in CONFIGURATION_REFERENCE.md; clarify privacy and defaults.
- Adjust example container definitions in UNATTENDED_DEPLOYMENTS.md (container entries and resource values).
- Change storage and flag variables and examples in BUILD_FUNC_USAGE_EXAMPLES.md (ssd-storage, var_fuse/var_tun, etc.).
- Expand TOOLS_FUNC_FUNCTIONS_REFERENCE.md with many setup_* function signatures, environment vars, clarified fetch_and_deploy_gh_release modes/parameters, and additional tool docs (nodejs, php, mariadb_db, postgresql_db, java, uv, yq, meilisearch, composer, build tools).

These updates improve onboarding, debugging guidance, and operational clarity for contributors and maintainers.

docs/guides/CONFIGURATION_REFERENCE.md

@@ -539,6 +539,25 @@ var_nesting=0    # Nested containers disabled
 
 ---
 
+### var_diagnostics
+
+**Type:** Boolean (yes or no)
+**Default:** `yes`
+**Description:** Determines if anonymous telemetry and diagnostic data is sent to Community-Scripts API.
+
+```bash
+var_diagnostics=yes      # Allow telemetry (helps us improve scripts)
+var_diagnostics=no       # Disable all telemetry
+```
+
+**Privacy & Usage:**
+- Data is strictly anonymous (random session ID)
+- Reports success/failure of installations
+- Maps error codes (e.g., APT lock, out of RAM)
+- No user-specific data, hostnames, or secret keys are ever sent
+
+---
+
 ### var_gpu
 
 **Type:** Boolean/Toggle
@@ -604,13 +623,14 @@ var_keyctl=0     # Keyctl disabled
 
 ### var_fuse
 
-**Type:** Boolean (0 or 1)
-**Default:** `0`
+**Type:** Boolean/Toggle
+**Options:** `yes` or `no`
+**Default:** `no`
 **Description:** Enable FUSE filesystem support.
 
 ```bash
-var_fuse=1       # FUSE enabled
-var_fuse=0       # FUSE disabled
+var_fuse=yes     # FUSE enabled
+var_fuse=no      # FUSE disabled
 ```
 
 **Required for:**

docs/guides/UNATTENDED_DEPLOYMENTS.md

@@ -220,10 +220,10 @@ done
 # batch-deploy-advanced.sh - Deploy multiple containers with individual configs
 
 declare -A CONTAINERS=(
-  ["pihole"]="2:1024:8:vmbr0:dns,network"
-  ["qui"]="4:4096:20:vmbr0:media,ui"
+  ["beszel"]="1:512:8:vmbr0:monitoring"
+  ["qui"]="2:1024:10:vmbr0:torrent,ui"
   ["thingsboard"]="6:8192:50:vmbr1:iot,industrial"
-  ["nginx"]="2:2048:10:vmbr0:webserver,proxy"
+  ["dockge"]="2:2048:10:vmbr0:docker,management"
 )
 
 for app in "${!CONTAINERS[@]}"; do