Ehab Younes bacb4fc6ed feat: expose per-app session counts (#29351) ...

Track individual applications across deployment statistics, Prometheus, telemetry, and the dashboard instead of exposing only fixed family totals. Preserve existing fields and gauges so current consumers can migrate without breaking.

- Add per-app counts with normalized identifiers and registry-backed display names, families, and bundled icons. Unrecognized apps retain their identifiers.
- Limit each statistics report to 64 distinct app names, combining excess names into an explicit overflow bucket.
- Group dashboard connections by family, including an Other category, with alphabetical per-app tooltips and distinct loading and empty states.
- Export app-keyed Prometheus counts separately from current family metadata, allowing queries to enrich historical counts without rewriting stored samples.
- Document family queries with unknown fallback, deployment isolation, and replica handling, alongside collection behavior and migration guidance.
- Include per-app counts in telemetry, update API schemas and documentation, and add regression coverage across collection, metrics, and dashboard behavior.

Closes #27411

2026-09-24 15:12:28 +03:00

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