Implement fenris status as the read-only CLI twin of the TUI,
composing from the observation store and allow-listed systemctl
properties per spec section 8.8.
New module src/fenris/status.py:
- Freshness grading with shared constants (section 8.9, LC-10)
- Configuration error from direct config reads (section 8.3, LC-4)
- Store fault / newer-schema exact phrases (section 9.4-9.5, FL-4/FL-5)
- Drive anomalies as ordinary facts (section 9.7, FL-7)
- Four separate service facts (section 7.3, LC-9, CI-2)
- Projection recomputed on read, never stored (section 6.10)
- Retired command rejection with migration pointers (section 8.8)
- Six disclosures via --disclosures flag (section 6.11, CI-4)
Updated fenris.py:
- Replaced old cmd_status with new status module integration
- Added retired command handlers (start/stop/run)
- Added global --device flag rejection
Tests: 43 new, 182 total passing, zero regressions.
Closes#27.
Hour classification (PR-4):
- Powered-off: POH delta < 90% of wall-clock span
- Active: DUW delta >= 256 MiB
- Idle: powered on + sampled + below active threshold
- Unknown: unsampled without POH evidence
- Four splits sum to exactly wall_clock_seconds
- Disabled time is never an hour state
Monitoring periods (FL-8):
- ensure_period_open: opens period at run moment if none exists
- close_period: closes with end cause
- is_inside_period: checks timestamp against period bounds
- Never backdated; wall-clock outside periods excluded from denominator
Day aggregates (ST-4, PR-5):
- Derived monotonically from hour rows
- UTC-bounded; no 23/25-hour days
- Coverage: known seconds / period wall-clock
- Gap hours inside periods contribute unknown seconds
- Hours outside periods excluded entirely
- No absent hour interpolated/estimated/fabricated (FL-3)
Raw sample pruning (ST-5):
- Prunes samples older than 14 days
- Hour observations and day aggregates retained indefinitely
Closes#22
xavierk