feat: establish the bounded production architecture

PLANS.md

@@ -392,7 +392,7 @@ If all criteria pass, set this milestone to `DONE`, append its execution record,
 
 ## Milestone 006 — Establish the bounded production architecture
 
-**Status:** `READY`  
+**Status:** `DONE`  
 **Depends on:** Milestone 005
 
 ### Objective
@@ -421,11 +421,22 @@ Create the production firmware and test structure without implementing game beha
 
 If all criteria pass, set this milestone to `DONE`, append its execution record, and change Milestone 007 from `BLOCKED` to `READY`.
 
+### Execution record
+
+- Date: 2026-08-28
+- Board model and revision: ESP32-C6FH4 QFN32, revision v0.2.
+- Toolchain and library versions: PlatformIO Core 6.1.19; `espressif32` 7.0.1; ESP-IDF 6.0.1; `esp_littlefs` 1.20.4.
+- Result: PASS.
+- Evidence: Added bounded production headers for configuration, types, application ownership, game engine, fleet generation, bot scheduling, sessions, presenter, statistics, transport, diagnostics, and deterministic interfaces. Added a fixed 16-command FIFO and a host test. HTTP diagnostics now include largest free block, connected clients, reset reason, and rejected oversized input. Network-facing code has no access to `application_t`; only the application queue may deliver commands to the future game owner.
+- Measurements: Firmware build passed with 38,212 / 327,680 B RAM (11.7%) and 1,000,730 / 2,097,152 B flash (47.7%), within the Milestone 005 architecture gate of 1,080,000 B firmware and 220,000 B remaining heap. `make -C test/host run` passed the host command-queue test.
+- Issues or deviations: No game behavior was implemented; that remains Milestone 007. No PSRAM, exceptions, RTTI, or heap-owning core containers were added.
+- Next action: Milestone 007 is ready. Do not start it unless explicitly requested.
+
 ---
 
 ## Milestone 007 — Implement and exhaustively test the game domain core
 
-**Status:** `BLOCKED`  
+**Status:** `READY`  
 **Depends on:** Milestone 006
 
 ### Objective