Dashboard creation by EMS demo setup and demo rules improvements

[igorrutka]

Description

• Added creation of dashboards to EMS setup asset
  EMS - Add dashboard generation to EMS setup service #7
• Added power consumption fluctuations to EMS demo rules and other improvements to forecast simulation demo rules EMS - Add additional functionality to EMS demo rules for testing purposes #6

Checklist

• 1. Acceptance criteria of the linked issue(s) are met
• 2. Tests are written and all tests pass
• 3. Changes are manually tested by you and the reviewer
• 4. Documentation is written or updated

[Copilot]

Pull request overview

Adds EMS demo improvements by templating and provisioning dashboards during EMS setup, and enhancing the demo simulation rules (including power consumption noise and updated forecast handling) to better support testing/demo scenarios.

Changes:

• Extend EmsOptimisationSetupService to create overview + battery dashboards from JSON templates during EMS demo setup.
• Enhance EmsDemoSimulationRules.groovy with configurable power fluctuations, updated forecast period handling, and adjusted scheduling cadence/signature changes.
• Add two dashboard template JSON files for EMS overview and battery monitoring.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 9 comments.

File	Description
ems/src/main/resources/ems/rules/EmsDemoSimulationRules.groovy	Adds power noise and changes forecast period/timers; adjusts summation behavior via new parameter.
ems/src/main/resources/ems/dashboards/EmsOverviewDashboard.json	New dashboard template consumed by setup service to generate an EMS overview dashboard.
ems/src/main/resources/ems/dashboards/EmsBatteryDashboard.json	New dashboard template consumed by setup service to generate an EMS battery dashboard.
ems/src/main/java/org/openremote/extension/ems/manager/EmsOptimisationSetupService.java	Wires dashboard creation into EMS setup flow and injects new rules placeholder for fluctuation magnitude.

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[Copilot]

This dashboard JSON includes environment-specific metadata (realm, ownerId, access, createdOn, and displayName). Since the setup service overwrites realm/displayName and creates the dashboard programmatically, keeping hard-coded ownerId/access (and stale createdOn) risks creating dashboards owned by a non-existent user or with unintended permissions. Recommend removing these fields from the template JSON (or explicitly overriding/clearing them in code before createNew).

Suggested change

	"createdOn": 1711029229921,
	"realm": "master",
	"ownerId": "e5ca8a39-5193-478d-ba86-57e7095679cf",
	"access": "1",
	"displayName": "New Dashboard",