[domain] message createdAt field

[capcom6]

Summary by CodeRabbit

• New Features
  • Message state responses now include the gateway’s message creation time.
  • Creation times are serialized in RFC3339 format, retain timezone offsets in serialized output, and can be read back from responses. Missing or null values default to zero time; invalid date-time values are rejected.
• Documentation
  • Added changelog entries covering message creation times, scheduled delivery times, and priority serialization.
  • Removed README guidance on inbox webhook delivery modes, deprecated APIs, certificate request methods, and webhook compatibility.

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Reviewing files that changed from the base of the PR and between 625e044 and d9e355c.

📒 Files selected for processing (1)

• CHANGELOG.md

🚧 Files skipped from review as they are similar to previous changes (1)

• CHANGELOG.md

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📝 Walkthrough

Walkthrough

MessageState now includes a CreatedAt timestamp with JSON date-time metadata. Tests cover serialization, deserialization, invalid values, missing values, offsets, and round trips. The changelog adds release entries, and the README removes API and webhook guidance.

Changes

MessageState timestamp

Layer / File(s)	Summary
Add CreatedAt to MessageState smsgateway/domain_messages.go, CHANGELOG.md	Adds the CreatedAt time.Time field with createdAt JSON and date-time format tags. The changelog records CreatedAt, ScheduleAt, and priority serialization details for listed releases.
Validate timestamp JSON behavior smsgateway/domain_messages_createdat_test.go	Tests RFC3339 serialization, offset handling, zero values, invalid input, absent and null fields, and round-trip preservation.

README guidance removal

Layer / File(s)	Summary
Remove API and webhook guidance README.md	Removes documentation about RefreshInbox webhook delivery modes, deprecated inbox APIs, CA CSR methods, and smsgateway/webhooks compatibility.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Feature

Merge Risk: 🔵 Low · up to d9e35

This change adds a createdAt timestamp to messages. The one open concern is that an external Go consumer that builds the message state with positional (unkeyed) struct literals could fail to compile after upgrading. That scenario is uncommon, so the risk is low. The owner should be aware of it before release.

Security Architecture Review

Security architecture risk: 🔵 Low · up to 625e0

The timestamp addition has limited demonstrated impact and does not change permissions or request behavior in the inspected client paths. External consumers may observe serialization or source-compatibility changes, and their usage is not available for review.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

• inferred — The demonstrated propagation scope is callers receiving MessageState from Send, GetState, or ListMessages, including callers that subsequently re-marshal it. Tenant, service, or data-store authority expansion was not established in those paths; downstream application exposure remains unmeasured.

Trust Boundaries and Controls

• observed — The timestamp crosses the existing gateway-response decoding boundary. Invalid timestamp text produces a decoding error under the specified tests, and the REST layer returns response-decoding errors rather than silently accepting malformed values.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 3 functions across 2 files. (1 skipped: 1 …	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely identifies the main change: adding the createdAt field to the domain message.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 3 functions across 2 files. (1 skipped: 1 unsupported.)

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

Files with missing lines	Coverage Δ
smsgateway/domain_messages.go	100.00% <ø> (ø)

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[capcom6]

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Actionable comments posted: 2

🤖 Prompt for all review comments with AI agents

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Inline comments:
In `@smsgateway/domain_messages.go`:
- Line 232: Preserve source compatibility for the exported MessageState struct
when adding CreatedAt: introduce the field only through a major API version, and
update MessageState composite literals to use keyed fields rather than
positional values.
- Line 232: Update MessageState.CreatedAt to preserve an absent createdAt value
during JSON serialization, preferably by changing it to *time.Time and updating
affected uses; alternatively validate and reject zero time.Time values before
serialization if absence is not supported.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 9b2dbc8f-46d2-4c1f-a060-3b0cdd971de7

📥 Commits

Reviewing files that changed from the base of the PR and between 8e80c89 and 45278c6.

📒 Files selected for processing (2)

• smsgateway/domain_messages.go
• smsgateway/domain_messages_createdat_test.go

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