feat: add ThingsBoard template

[BinkyTwin]

Summary

• add a ThingsBoard Community Edition template backed by PostgreSQL
• include a one-shot idempotent init service for first-run schema/system asset setup
• add template metadata, domain config, README mount, and SVG logo

/claim #152
Closes #545

Validation

• node dedupe-and-sort-meta.js
• node --import ./build-scripts/node_modules/tsx/dist/loader.mjs build-scripts/validate-template.ts --dir blueprints/thingsboard
• node --import ./build-scripts/node_modules/tsx/dist/loader.mjs build-scripts/validate-docker-compose.ts --file blueprints/thingsboard/docker-compose.yml
• POSTGRES_DB=thingsboard POSTGRES_USER=postgres POSTGRES_PASSWORD=dummy LOAD_DEMO=false JAVA_OPTS="-Xms512m -Xmx2048m" SECURITY_CORS_ALLOWED_ORIGINS="http://example.com,https://example.com" docker compose -f blueprints/thingsboard/docker-compose.yml config
• git diff --check

Notes

• Uses the current ThingsBoard CE 4.3.1.1 Docker image from the official install docs.
• The template exposes the web UI and HTTP API through Dokploy; direct MQTT/CoAP transport exposure is left to deployment-specific port configuration.

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[Copilot]

Pull request overview

Adds a new Dokploy blueprint for deploying ThingsBoard Community Edition backed by PostgreSQL, including an init job for first-run setup plus metadata and assets so it can appear in the template catalog.

Changes:

• Added blueprints/thingsboard/ with a ThingsBoard + Postgres Compose stack and a one-shot init service.
• Added Dokploy configuration (template.toml) including domain mapping, env vars, and an embedded README mount.
• Registered the template in meta.json and added an SVG logo.

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 1 comment.

File	Description
meta.json	Registers the new thingsboard template in the central catalog index.
blueprints/thingsboard/docker-compose.yml	Defines ThingsBoard CE + PostgreSQL services, including an init container gating startup.
blueprints/thingsboard/template.toml	Provides Dokploy variables, domain routing, env wiring, and README mount content.
blueprints/thingsboard/thingsboard.svg	Adds the ThingsBoard logo asset referenced by meta.json.