Optimize navigation, terrain, recording, and sensors

[AdrienGrp]

What changed

• Optimizes GPS request policies, screen-off behavior, auto-pause, marker prediction, compass continuity, and related diagnostics for better responsiveness and lower background cost.
• Makes DEM handling resilient across detailed/standard terrain, fixes hillshade fallback rendering, and adds source-specific download progress and elevation improvements.
• Improves recording metadata, profile-aware REC dashboards and recap details, battery benchmark telemetry, and activity-specific metric defaults.
• Hardens external BLE sensors with subscription-based readiness, setup timeouts, serialized callbacks, bounded reconnects and scans, stale-value clearing, Cycling Power discovery, notification/indication compatibility, and sampled diagnostics.
• Updates bundled map themes/licensing and keeps app-owned resources explicitly English-only after removal of the partial French localization.

Why

This branch applies the findings from the post-5.6 app audit and subsequent field tests. The main root causes were lifecycle transitions being treated as ready too early, fallback availability being conflated with selected download state, high-frequency work continuing outside the visible/active path, and REC configuration not being fully separated by activity profile.

User impact

• More stable compass and marker behavior after screen transitions.
• Better battery behavior without reducing normal recording quality.
• Reliable maps and elevation when only standard DEM data is available.
• Independent, activity-appropriate Hike and Bike REC dashboards.
• External sensors report Connected only when measurement subscriptions are ready and recover more cleanly from interruptions.

Verification

• ktlintCheck
• detekt
• :app:compileDebugKotlin
• :glancemapcompanionapp:compileDebugKotlin
• :app:testDebugUnitTest
• :glancemapcompanionapp:testDebugUnitTest
• :app:lintDebug
• :glancemapcompanionapp:lintDebug
• Local BRouter routing metadata compatibility check