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feat(#76): harvest request-scoped availability and freshness truth

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Backend-only re-cut of the #76 availability work onto main, stacked on the
canonical Weekend Context API. Adds request-scoped freshness reporting so
aggregate responses cannot report fresh when a component is stale, plus
local-first driver summary resolution and cache/pacing truth.

The frontend half of #76 is deliberately excluded: it is built on the
Weekend shell that failed owner review, including the full-width Partial
banner treatment. Availability presentation is re-cut with the shell in #89.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Aman Tahiliani
2026-07-26 09:14:37 -04:00
parent d03e480e03
commit 77a6b0f2dd
23 changed files with 1587 additions and 137 deletions
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16
internal/query/context.go
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@@ -40,6 +40,7 @@ type LiveEvidence struct {
// ContextAvailability is structured source state for a referenced session.
type ContextAvailability struct {
Source string `json:"source"`
Schedule string `json:"schedule"`
LiveTransport string `json:"live_transport"`
LiveSession string `json:"live_session"`
@@ -298,21 +299,28 @@ func meetingModelByKey(meetings []store.Meeting, key int) *models.Meeting {
func sessionRef(c contextCandidate, evidence LiveEvidence, now time.Time) *ContextSession {
session := sessionToModel(c.session)
meeting := meetingToModel(c.meeting)
availability := ContextAvailability{Schedule: "available", LiveSession: "inactive", Archive: "unavailable", Freshness: "fresh", Limitations: []string{}}
// Schedule and analysis are domain-store facts. Without an ingestion
// timestamp the resolver cannot honestly call them network-fresh, so local
// is the baseline freshness vocabulary exposed to clients.
availability := ContextAvailability{Source: "local", Schedule: "available", LiveSession: "inactive", Archive: "unavailable", Freshness: "local", Limitations: []string{}}
availability.LiveTransport = "unknown"
if c.session.SessionKey == 0 {
availability.Schedule = "unavailable"
availability.Limitations = append(availability.Limitations, "schedule_identity_unmatched")
}
if evidence.Active && liveMatches(evidence, c.meeting, c.session) {
availability.Source = "mixed"
availability.LiveTransport = "connected"
availability.LiveSession = "active"
availability.Freshness = "live"
if !evidence.ObservedAt.IsZero() {
availability.ObservedAt = evidence.ObservedAt.Format(time.RFC3339)
}
}
if c.archived {
availability.Source = "mixed"
availability.Archive = "available"
availability.Freshness = "archive"
if !evidence.ObservedAt.IsZero() {
availability.ObservedAt = evidence.ObservedAt.Format(time.RFC3339)
}
@@ -326,6 +334,12 @@ func sessionRef(c contextCandidate, evidence LiveEvidence, now time.Time) *Conte
} else {
availability.LocalAnalysis = "pending"
}
if availability.LocalAnalysis == "partial" && availability.Freshness == "local" {
availability.Freshness = "partial"
}
if c.session.SessionKey == 0 && availability.LiveSession == "active" {
availability.Source = "fia"
}
return &ContextSession{Session: session, Meeting: &meeting, Availability: availability}
}