Signals: index the judge's query, six calls at once, one call per item on the server's key, tokens counted, a week's look-back an admin sets, edits that ask again only what was picked out (#274, #275, #276)

The judge's query read all of entries (605 MB, 566 ms) on every wake; an
index on each feed's items by date, as the query asks, and the rechecks
in a half of their own. Calls ran one at a time, about 150 ms each, so a
new Signal's month of about 8,000 items took twenty minutes: six in flight
now. On the server's key everyone's Signals on an item share one call.
TypeSafe's token counts go to /metrics and each jev span.

An item's text is cut at 1,000 characters instead of 2,000: on 55 real
items of eight podcast feeds and six Signals, on the development key,
1,000 changed none of 330 verdicts (nor did the same request twice) and
saved 12% of the input tokens, 1,266 to 1,112 a call; 500 changed one.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

site/api.mjs

@@ -219,7 +219,7 @@ export const ipx = {
         },
         {
           method: 'POST', path: '/api/signals', slug: 'post-signals',
-          summary: 'Make a Signal. It looks back over the last 30 days, then at each new item.',
+          summary: 'Make a Signal. It looks back over the last week (an admin’s setting), then at each new item.',
           doc: '<p>Each item is one call to TypeSafe: on the server’s key when an admin has chosen that (<code>signals_on_server</code>), otherwise on yours, saved with <a href="/docs/api/ipx/auth/patch-me"><code>PATCH /api/me</code></a>. Without a key, nothing is picked out.</p>',
           body: 'SignalBody', returns: '{ id: i64 }',
           errors: [['400 Bad Request', 'No name or one over 100 characters, not 1 to 50 words, a description over 500 characters, or an icon that is not a style and a name.']],
@@ -227,7 +227,7 @@ export const ipx = {
         },
         {
           method: 'PATCH', path: '/api/signals/{id}', slug: 'patch-signal',
-          summary: 'Change a Signal. A new name, words or description reads everything again; a new icon does not.',
+          summary: 'Change a Signal. A new name, words or description asks again about what it picked out, and about new items as they come; a new icon asks nothing.',
           pathParams: [['id', 'i64', 'The Signal’s id.']],
           body: 'SignalBody', returns: '204 No Content',
           errors: [['400 Bad Request', 'As for a new Signal.'], ['404 Not Found', 'No Signal of yours has that id.']],
@@ -431,6 +431,7 @@ export const ipx = {
       ['version', 'String', 'ipx’s version.'],
       ['typesafe_key_set', 'bool', 'You have a TypeSafe key saved for Signals. The key itself is never sent back.'],
       ['signals', 'String', 'Whose key Signals are judged on: <code>server</code>, for everyone, or <code>own</code>, each person’s.'],
+      ['signal_days', 'u64', 'How many days back a new Signal reads.'],
     ] },
     { name: 'MePatch', doc: 'What <code>PATCH /api/me</code> changes.', fields: [['blocked', 'Option<Vec<String>>', 'Replaces the list.'],
       ['typesafe_key', 'Option<Option<String>>', 'Your TypeSafe key for Signals, checked with TypeSafe and then saved; <code>null</code> or empty forgets it.']] },
@@ -573,6 +574,7 @@ export const ipx = {
       ['directory_url', 'String', ''], ['directory_token_set', 'bool', 'The token itself is never sent back.'],
       ['directory_share', 'bool', ''],
       ['signals_on_server', 'bool', 'Everyone’s Signals are judged on the server’s TypeSafe key, not each person’s.'],
+      ['signal_days', 'u64', 'How many days back a new Signal reads; 7 unless an admin sets it.'],
       ['typesafe_server_key', 'bool', 'The server has a TypeSafe key (<code>TYPESAFE_KEY</code>); without one, <code>signals_on_server</code> changes nothing.'],
     ] },
     { name: 'SettingsPatch', doc: 'What <code>PATCH /api/settings</code> changes. Leave out what stays.', fields: [
@@ -581,6 +583,7 @@ export const ipx = {
       ['directory_url', 'Option<String>', 'Empty for no directory.'], ['directory_token', 'Option<String>', 'Replaces it; empty clears it.'],
       ['directory_share', 'Option<bool>', ''],
       ['signals_on_server', 'Option<bool>', 'Judge everyone’s Signals on the server’s TypeSafe key.'],
+      ['signal_days', 'Option<u64>', '1 to 365.'],
     ] },
     { name: 'UserRow', doc: 'An account.', fields: [['id', 'i64', ''], ['name', 'String', ''], ['admin', 'bool', ''], ['password', 'bool', 'Has one; without, it signs in only by single sign-on.'], ['created', 'Option<i64>', ''], ['last_login', 'Option<i64>', '']] },
     { name: 'NewUser', doc: '', fields: [['name', 'String', 'No commas, semicolons or line breaks.'], ['password', 'String', 'Empty for single sign-on only.'], ['admin', 'bool', '']] },