Fix European trip return heuristic for weekend location tracking

Adjust European short trip heuristic from >3 days to >1 day to correctly
detect when user has returned home from European trips. This fixes the
April 29-30, 2023 case where the location incorrectly showed "Sankt Georg, Hamburg"
instead of "Bristol" when the user was free (no events scheduled) after
the foss-north trip ended on April 27.

The previous logic required more than 3 days to pass before assuming
return home from European countries, but for short European trips by
rail/ferry, users typically return within 1-2 days.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

node_modules/ajv/lib/vocabularies/core/id.ts

@@ -0,0 +1,10 @@
+import type {CodeKeywordDefinition} from "../../types"
+
+const def: CodeKeywordDefinition = {
+  keyword: "id",
+  code() {
+    throw new Error('NOT SUPPORTED: keyword "id", use "$id" for schema ID')
+  },
+}
+
+export default def

node_modules/ajv/lib/vocabularies/core/index.ts

@@ -0,0 +1,16 @@
+import type {Vocabulary} from "../../types"
+import idKeyword from "./id"
+import refKeyword from "./ref"
+
+const core: Vocabulary = [
+  "$schema",
+  "$id",
+  "$defs",
+  "$vocabulary",
+  {keyword: "$comment"},
+  "definitions",
+  idKeyword,
+  refKeyword,
+]
+
+export default core

node_modules/ajv/lib/vocabularies/core/ref.ts

@@ -0,0 +1,129 @@
+import type {CodeKeywordDefinition, AnySchema} from "../../types"
+import type {KeywordCxt} from "../../compile/validate"
+import MissingRefError from "../../compile/ref_error"
+import {callValidateCode} from "../code"
+import {_, nil, stringify, Code, Name} from "../../compile/codegen"
+import N from "../../compile/names"
+import {SchemaEnv, resolveRef} from "../../compile"
+import {mergeEvaluated} from "../../compile/util"
+
+const def: CodeKeywordDefinition = {
+  keyword: "$ref",
+  schemaType: "string",
+  code(cxt: KeywordCxt): void {
+    const {gen, schema: $ref, it} = cxt
+    const {baseId, schemaEnv: env, validateName, opts, self} = it
+    const {root} = env
+    if (($ref === "#" || $ref === "#/") && baseId === root.baseId) return callRootRef()
+    const schOrEnv = resolveRef.call(self, root, baseId, $ref)
+    if (schOrEnv === undefined) throw new MissingRefError(it.opts.uriResolver, baseId, $ref)
+    if (schOrEnv instanceof SchemaEnv) return callValidate(schOrEnv)
+    return inlineRefSchema(schOrEnv)
+
+    function callRootRef(): void {
+      if (env === root) return callRef(cxt, validateName, env, env.$async)
+      const rootName = gen.scopeValue("root", {ref: root})
+      return callRef(cxt, _`${rootName}.validate`, root, root.$async)
+    }
+
+    function callValidate(sch: SchemaEnv): void {
+      const v = getValidate(cxt, sch)
+      callRef(cxt, v, sch, sch.$async)
+    }
+
+    function inlineRefSchema(sch: AnySchema): void {
+      const schName = gen.scopeValue(
+        "schema",
+        opts.code.source === true ? {ref: sch, code: stringify(sch)} : {ref: sch}
+      )
+      const valid = gen.name("valid")
+      const schCxt = cxt.subschema(
+        {
+          schema: sch,
+          dataTypes: [],
+          schemaPath: nil,
+          topSchemaRef: schName,
+          errSchemaPath: $ref,
+        },
+        valid
+      )
+      cxt.mergeEvaluated(schCxt)
+      cxt.ok(valid)
+    }
+  },
+}
+
+export function getValidate(cxt: KeywordCxt, sch: SchemaEnv): Code {
+  const {gen} = cxt
+  return sch.validate
+    ? gen.scopeValue("validate", {ref: sch.validate})
+    : _`${gen.scopeValue("wrapper", {ref: sch})}.validate`
+}
+
+export function callRef(cxt: KeywordCxt, v: Code, sch?: SchemaEnv, $async?: boolean): void {
+  const {gen, it} = cxt
+  const {allErrors, schemaEnv: env, opts} = it
+  const passCxt = opts.passContext ? N.this : nil
+  if ($async) callAsyncRef()
+  else callSyncRef()
+
+  function callAsyncRef(): void {
+    if (!env.$async) throw new Error("async schema referenced by sync schema")
+    const valid = gen.let("valid")
+    gen.try(
+      () => {
+        gen.code(_`await ${callValidateCode(cxt, v, passCxt)}`)
+        addEvaluatedFrom(v) // TODO will not work with async, it has to be returned with the result
+        if (!allErrors) gen.assign(valid, true)
+      },
+      (e) => {
+        gen.if(_`!(${e} instanceof ${it.ValidationError as Name})`, () => gen.throw(e))
+        addErrorsFrom(e)
+        if (!allErrors) gen.assign(valid, false)
+      }
+    )
+    cxt.ok(valid)
+  }
+
+  function callSyncRef(): void {
+    cxt.result(
+      callValidateCode(cxt, v, passCxt),
+      () => addEvaluatedFrom(v),
+      () => addErrorsFrom(v)
+    )
+  }
+
+  function addErrorsFrom(source: Code): void {
+    const errs = _`${source}.errors`
+    gen.assign(N.vErrors, _`${N.vErrors} === null ? ${errs} : ${N.vErrors}.concat(${errs})`) // TODO tagged
+    gen.assign(N.errors, _`${N.vErrors}.length`)
+  }
+
+  function addEvaluatedFrom(source: Code): void {
+    if (!it.opts.unevaluated) return
+    const schEvaluated = sch?.validate?.evaluated
+    // TODO refactor
+    if (it.props !== true) {
+      if (schEvaluated && !schEvaluated.dynamicProps) {
+        if (schEvaluated.props !== undefined) {
+          it.props = mergeEvaluated.props(gen, schEvaluated.props, it.props)
+        }
+      } else {
+        const props = gen.var("props", _`${source}.evaluated.props`)
+        it.props = mergeEvaluated.props(gen, props, it.props, Name)
+      }
+    }
+    if (it.items !== true) {
+      if (schEvaluated && !schEvaluated.dynamicItems) {
+        if (schEvaluated.items !== undefined) {
+          it.items = mergeEvaluated.items(gen, schEvaluated.items, it.items)
+        }
+      } else {
+        const items = gen.var("items", _`${source}.evaluated.items`)
+        it.items = mergeEvaluated.items(gen, items, it.items, Name)
+      }
+    }
+  }
+}
+
+export default def