docs: Finalize v0.3, add OTA section to USAGE.md

TASKS.md

@@ -2,31 +2,37 @@
 
 **Last Updated:** 2026-02-04
 
-## Current Sprint: v0.3 - OTA Updates
+## Current Sprint: v0.4 - Adaptive Sampling
 
 ### P0 - Critical
-- [x] Create dual OTA partition table (`partitions.csv`)
-- [x] Update `sdkconfig.defaults` (4MB flash, custom partitions, rollback, HTTP OTA)
-- [x] Firmware: OTA command, ota_task, LED_OTA, rollback validation
-- [x] Firmware: Add version to STATUS reply
-- [ ] `idf.py reconfigure` to regenerate sdkconfig
-- [ ] Build and USB-flash first device (partition table change requires USB)
+- [ ] On-device CSI wander calculation (simplified)
+- [ ] Adaptive rate: 10 pkt/s idle → 100 pkt/s on motion
 
 ### P1 - Important
-- [x] Pi-side `esp-ota` tool (HTTP server + OTA orchestration)
-- [x] `esp-fleet ota` subcommand (sequential fleet OTA)
-- [ ] Test OTA end-to-end: `esp-ota amber-maple.local`
-- [ ] Regenerate `sdkconfig.sample`
+- [ ] Rate change notification to Pi
+- [ ] Tunable motion threshold via UDP command
 
 ### P2 - Normal
 - [ ] OTA update remaining fleet (muddy-storm, hollow-acorn) via USB
 - [ ] Test rollback (flash bad firmware, verify auto-revert)
-- [ ] Document esp-ota in USAGE.md
 
 ### P3 - Low
 - [ ] Document esp-crab dual-antenna capabilities
 - [ ] Document esp-radar console features
 
+## Completed: v0.3 - OTA Updates
+
+- [x] Dual OTA partition table (`partitions.csv`)
+- [x] 4MB flash, custom partitions, rollback in sdkconfig.defaults
+- [x] Firmware: OTA command, ota_task, LED_OTA, rollback validation
+- [x] Firmware: version in STATUS reply
+- [x] Pi-side `esp-ota` tool (HTTP server + OTA orchestration)
+- [x] `esp-fleet ota` subcommand (sequential fleet update)
+- [x] Build and USB-flash amber-maple (partition table change)
+- [x] End-to-end OTA test verified
+- [x] Regenerate sdkconfig.sample
+- [x] Update CHEATSHEET.md, USAGE.md
+
 ## Completed: v0.2 - Remote Management
 
 - [x] Firmware: UDP command listener (port 5501)
@@ -55,5 +61,5 @@
 - NVS offset changes with new partition table — first USB flash resets saved config
 - First device must be USB-flashed to switch partition table, subsequent updates via OTA
 - `esp_https_ota` is built into ESP-IDF core — no extra deps needed
-- OTA download ~790 KB on LAN takes ~3-5s, well under 30s watchdog
+- OTA download ~896 KB on LAN takes ~3-5s, well under 30s watchdog
 - CSI data keeps flowing during OTA download