test: add reporter jsonrpc coverage

[karthiknadig]

Summary:

• Extract the JSONRPC reporter environment-kind filter into a private helper for direct testing.
• Add tests for filter behavior, telemetry payload serialization, and log payload serialization.
• Covers the pet-reporter slice from the Coverage: ranked plan to move workspace coverage toward 90% #389 coverage plan.

Validation:

• cargo test -p pet-reporter
• cargo fmt --all
• cargo clippy --all -- -D warnings

Refs #389

[github-actions]

Performance Report (Linux) ✅

Metric	PR (P50)	PR (P95)	Baseline (P50)	Delta	Change
Server Startup	1ms	1ms	1ms	0ms	0%
Full Refresh	71ms	113ms	96ms	-25ms	-20.0%

Results based on 10 iterations. P50 = median, P95 = 95th percentile.

---

Legend

• 🚀 Significant speedup (>100ms faster)
• ✅ Faster than baseline
• ➖ No significant change
• 🔺 Slower than baseline (>100ms)
• ⚠️ Significant slowdown (>500ms)

[github-actions]

Test Coverage Report (Linux)

Metric	Value
Current Coverage	73.8%
Base Branch Coverage	73.6%
Delta	.2% ✅

---

Coverage increased! Great work!

[github-actions]

Performance Report (macOS)

Metric	PR (P50)	PR (P95)	Baseline (P50)	Delta
Server Startup	54ms	595ms	58ms	-4ms
Full Refresh	141ms	28625ms	99ms	42ms

Results based on 10 iterations. P50 = median, P95 = 95th percentile.

---

Legend

• 🚀 Significant speedup (>100ms faster)
• ✅ Faster than baseline
• ➖ No significant change
• 🔺 Slower than baseline (>100ms)
• ⚠️ Significant slowdown (>500ms)

[github-actions]

Performance Report (Windows) ➖

Metric	PR (P50)	PR (P95)	Baseline (P50)	Delta	Change
Server Startup	9ms	11ms	8ms	1ms	12.5%
Full Refresh	143ms	382ms	128ms	15ms	11.7%

Results based on 10 iterations. P50 = median, P95 = 95th percentile.

---

Legend

• 🚀 Significant speedup (>100ms faster)
• ✅ Faster than baseline
• ➖ No significant change
• 🔺 Slower than baseline (>100ms)
• ⚠️ Significant slowdown (>500ms)

[github-actions]

Test Coverage Report (Windows)

Metric	Value
Current Coverage	70.03%
Base Branch Coverage	69.86%
Delta	0.17% ✅

---

Coverage increased! Great work!

[Copilot]

Pull request overview

This PR improves unit test coverage for the pet-reporter JSON-RPC reporter by extracting the environment-kind filtering logic into a small helper that can be tested directly, and by adding serialization-focused tests for telemetry and log payloads.

Changes:

• Refactored the JSON-RPC reporter’s report_only filtering into a private should_report_environment() helper.
• Added unit tests covering filter allow/reject behavior.
• Added unit tests verifying JSON serialization shape for telemetry payloads and log payloads.

Show a summary per file

File	Description
crates/pet-reporter/src/jsonrpc.rs	Extracts environment filtering into a helper and adds unit tests for filtering + telemetry/log JSON serialization.

Copilot's findings

• Files reviewed: 1/1 changed files
• Comments generated: 0