feat(metrics): ✨ 3D impulse-response model + TRIMP #34

[dvorka]

---

This PR brings

• SOTA 3D impulse-response predictive training model.
• TRIMP revamp w/ several new charts, insights, analyses.

---

Plan TRIMP:

• slides to control k1, k2, t1 and t1
  • calibration section w/ explanation: per-sport calibration, per athlete calibration
  • sliders to have human friendly names ~ "adaptation to load", "regeneration speed"
  • athlete to move sliders & push Recalculate button to get update TRIMP
  • re-calibration cannot be on the separate page (as now), but on the page w/ the charts to have feedback
• histogram of workout TRIMPs to see what's typical load
• TRIMP w/o HR - solely based on the approximation

---

Plan 3DIRM:

• perfect workout 3DIRM page implementation: fast, efficient, correct
  • terminology refactor towards MyTraL terms
• perfect insight 3DIRM page implementation: fast, pre-calculation, on-demand completion (spinner + tasks)
  • terminology refactor towards MyTraL terms
  • dot for every workout
  • efficient and smart caching
  • irm3d_cache.json stored in data/[user UUID]/blobs/irm3d_cache.json ... misplaced
  • cache must be update asynchronously - show spinner page (currently not shown when it is supposed to be shown)
• add 3D clustering

Related:

• [Feature] TRIMP #36

  • [Enhancement] menu/Progress/Athlete Metrics - page footer details #57
  • [Enhancement] ActivityEntity.trimp #63

• [Feature] 3D IRM - SOTA performance, fatigue and fitness tracking model #34

  • [Enhancement] 3D activities chart for 3D IR model #44
  • [Feature] 3D IRM workouts clustering @ 3D activities scatter plot #59
  • [Feature] 3D IRM workouts cosine distance @ 3D activities chart #58
  • [Enhancement] menu/Progress/Athlete Metrics - page footer details #57
  • [Enhancement] ActivityEntity.ss_* / .irm3D_* #64

[dvorka]

@claude review

[dvorka]

Closing this PR in favor of #94 and #95