Updates the ADR log, architecture, limitations, perf table and README to match
what now exists, rather than what was expected.
**The perf number was wrong and is now honest.** The M0 figure of 0.279 MB
excluded SQLite entirely — the placeholder binary never referenced the crate, so
dead-code elimination dropped it. With the daemon actually opening a database it
is **1.364 MB**, of which bundled SQLite is ~1.1 MB. That is 1.1 MB of the 5 MB
budget spoken for, leaving 3.8 MB for D-Bus, X11 and a UI toolkit.
This is the first number that makes the section 5 budget feel like a budget
rather than a formality, and it turns ADR-4's bundled-vs-system-linked choice
into a real trade-off with a measured price on both sides.
- ADR-4 marked accepted and implemented, with that trade-off left open.
- ARCHITECTURE.md documents why `blocker-storage` is a sibling crate and not a
submodule: the dependency direction is what keeps the zero-dependency purity
proof automatic rather than a grep someone can route around.
- LIMITATIONS.md drops the stale "storage has no I/O" shortfall and records the
bundled-vs-system question instead, plus the fact that `LockState` still always
evaluates to Normal.
- README status table and layout updated.
Co-Authored-By: Claude Code <noreply@anthropic.com>
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