chore(release): bump to v0.10.0

Version bumped in backend/main.py, README header/highlights/history,
and CHANGELOG.md with a comprehensive 0.10.0 entry covering the SFM
integration work shipped on this branch.

Highlights:
- SFM event store is now the authoritative vibration data source
- SFM-primary seismograph status with heartbeat fallback
- Dashboard rework (top-row reorder, schedule moved, SFM-sourced
  Recent Call-Ins)
- Event detail modal + sortable events tables across all event
  surfaces
- Events attribution engine + metadata-backfill tool
- /admin/sfm + /admin/slmm diagnostic pages under Developer settings
- Tools workflow hub at /tools (Pair Devices, Project Tidy, Backfill)
- Sidebar reorganization (single Devices entry w/ tabs, new Events
  + Tools entries)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

backend/main.py

@@ -30,7 +30,7 @@ Base.metadata.create_all(bind=engine)
 ENVIRONMENT = os.getenv("ENVIRONMENT", "production")
 
 # Initialize FastAPI app
-VERSION = "0.9.4"
+VERSION = "0.10.0"
 if ENVIRONMENT == "development":
     _build = os.getenv("BUILD_NUMBER", "0")
     if _build and _build != "0":