murmur 0.3.1

Four fixes since v0.3.0, all of them things the radio had been getting wrong
about you. A request made for one afternoon no longer becomes who you are, and
a song you heard this afternoon stops coming back tonight — the avoid-list is
read by age now, seven days, because repetition is felt in time and not in
track counts. The pick stopped paying for reasoning it never read: 82 s down to
11.6 s against a faked network, 29-30 s end to end. The setup guide can finally
answer what the reading speed is set to instead of only changing it. And every
Claude call was re-tiered by what a mistake costs — the voice you hear and the
profile you keep run on opus, the background picks on sonnet, nothing below.

What's Changed

• fix(setup): the guide reads the knobs it can write, and the switch says when it cuts [spec 03-03] by @wine-fall in #270
• perf(music): the pick stops paying for thinking it never reads [spec 04] by @wine-fall in #271
• fix(memory): a request made for this afternoon stops becoming who you are [spec 05-01] by @wine-fall in #276
• fix(music): a song you heard this afternoon stops coming back tonight [spec 03-01] by @wine-fall in #277
• chore(release): 0.3.1 by @wine-fall in #279

Full Changelog: v0.3.0...v0.3.1