Docs describe features that are not implemented

[jtdub]

Problem

Several documentation pages describe features as functional that are actually stubbed out in code:

1. Batch processing: Docs say "process multiple devices in parallel" but the implementation is synchronous and sequential (batch.py:25, platform_service.py:127).
2. Tag-based filtering: Remediation docs describe applying and filtering by tags, but apply_tags() and tag filtering in generate_remediation() are no-ops (remediation_service.py:41-44, 82-97).
3. Platform rules: Platform docs describe "platform-specific configuration rules" but the endpoint returns empty data for every platform (platform_service.py:53-64).

Suggested Fix

Either:

• Implement the features to match the documentation, or
• Update the docs to mark these as "planned" / "coming soon" so users have accurate expectations.