fix(database): reconcile chat session activity and state version

[adityathebe]

last_activity_at is a high-water mark. The activity trigger and transcript ingest preserve that invariant, but touchChatSession assigned the current time directly and could move it backwards.

This changes the chat writer to use the same monotonic semantics as the other writers.

touchChatSession also attempted to increment state_version, but the session state trigger always discarded that increment because no state fields changed. The ineffective write is removed, preserving the existing optimistic-concurrency behavior.

Tests cover both contracts: chat activity cannot move backwards, and a chat touch does not advance state_version.

Closes #57

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📥 Commits

Reviewing files that changed from the base of the PR and between ff7eed3 and 0527e18.

📒 Files selected for processing (2)

• pkg/database/session_chat_store.go
• pkg/database/session_last_activity_integration_test.go

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[github-actions]

Gavel summary

Source	Pass	Fail	Skip	Duration

Totals: 0 passed · 0 failed · 0 skipped · -

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[github-actions]

Gavel summary

Source	Pass	Fail	Skip	Duration
ai	87	0	0	40ms
aichat	113	0	2	13.1s
anthropicmock	1	0	0	1ms
api	80	0	0	30ms
attachments	5	0	0	7ms
bash	4	0	0	180.677µs
callertools	10	0	0	101ms
captain	6	0	0	3ms
claude	22	0	0	14ms
claudeagent	13	0	0	231ms
cli	209	0	0	6.8s
cmux	4	0	0	345.274µs
collections	12	0	0	356.817µs
credentials	5	0	0	40ms
database	15	0	0	4.2s
genkit	25	0	0	104ms
gitagent	66	0	0	9.1s
github.com/flanksource/captain/migrations	11	0	0	4.4s
github.com/flanksource/captain/pkg/ai	232	0	0	260ms
github.com/flanksource/captain/pkg/ai/agent	23	0	0	-
github.com/flanksource/captain/pkg/ai/agent/commit	52	0	0	5.0s
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github.com/flanksource/captain/pkg/ai/agent/verify	21	0	0	370ms
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github.com/flanksource/captain/pkg/ai/assistanttags	15	0	0	-
github.com/flanksource/captain/pkg/ai/fixture	42	0	0	210ms
github.com/flanksource/captain/pkg/ai/fixture/kubeproxy	2	0	0	40ms
github.com/flanksource/captain/pkg/ai/fixture/mcpproxy	6	0	0	-
github.com/flanksource/captain/pkg/ai/history	54	0	0	-
github.com/flanksource/captain/pkg/ai/internal/gen-model-registry	12	0	0	-
github.com/flanksource/captain/pkg/ai/middleware	25	0	0	-
github.com/flanksource/captain/pkg/ai/pricing	9	0	0	10ms
github.com/flanksource/captain/pkg/ai/prompt	16	0	0	10ms
github.com/flanksource/captain/pkg/ai/provider	144	0	0	10ms
github.com/flanksource/captain/pkg/ai/provider/claudeagent	44	0	0	1.4s
github.com/flanksource/captain/pkg/ai/provider/cmux	119	0	0	880ms
github.com/flanksource/captain/pkg/ai/provider/genkit	36	0	0	-
github.com/flanksource/captain/pkg/ai/provider/jsonrpc	6	0	0	50ms
github.com/flanksource/captain/pkg/aichat	5	0	0	100ms
github.com/flanksource/captain/pkg/aimock	50	0	7	490ms
github.com/flanksource/captain/pkg/aimock/anthropicmock	14	0	0	20ms
github.com/flanksource/captain/pkg/aimock/openaimock	18	0	0	40ms
github.com/flanksource/captain/pkg/api	136	0	0	390ms
github.com/flanksource/captain/pkg/api/registry	96	0	0	-
github.com/flanksource/captain/pkg/bash	348	0	0	30ms
github.com/flanksource/captain/pkg/captainconfig	25	0	0	-
github.com/flanksource/captain/pkg/claude	138	0	0	10ms
github.com/flanksource/captain/pkg/claude/tools	18	0	0	-
github.com/flanksource/captain/pkg/cli	532	0	0	47.9s
github.com/flanksource/captain/pkg/cmux	1	0	0	-
github.com/flanksource/captain/pkg/codexconfig	10	0	0	10ms
github.com/flanksource/captain/pkg/container	72	0	1	-
github.com/flanksource/captain/pkg/database	101	0	0	15.3s
github.com/flanksource/captain/pkg/dod	11	0	0	1m0s
github.com/flanksource/captain/pkg/gitagent	31	0	0	530ms
github.com/flanksource/captain/pkg/gitagent/proxy	12	0	0	10ms
github.com/flanksource/captain/pkg/monitor	54	0	0	2.6s
github.com/flanksource/captain/pkg/sandbox	1	0	0	-
github.com/flanksource/captain/pkg/sandbox/adapter	26	0	0	-
github.com/flanksource/captain/pkg/sandbox/presets	13	0	0	-
github.com/flanksource/captain/pkg/session	70	0	0	10ms
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openaimock	2	0	0	175.256µs
provider	10	0	0	12ms
registry	38	0	0	1ms
session	28	0	0	19ms
tools	38	0	0	1ms

Totals: 3541 passed · 0 failed · 10 skipped · 2m59s

View full results