fix(restapi): account for extra query binds

[soumajitgh]

Summary

• Reserve SQLite bind capacity for fixed parameters and secondary sqlc.slice values.
• Batch block-trip and active-route queries to stay within the 999-variable compatibility limit.
• Add regression coverage for a full ID batch with service-ID and fixed binds.

Closes #1367

Testing

• CGO_ENABLED=1 go test -tags "sqlite_fts5 sqlite_math_functions" ./internal/restapi

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Review details

⚙️ Run configuration

Configuration used: Repository UI

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: 3c11bab1-347c-41d3-a5ac-cfe2d1051dc9

📥 Commits

Reviewing files that changed from the base of the PR and between 44b9051 and 82a2d5b.

📒 Files selected for processing (2)

• internal/restapi/reference_utils.go
• internal/restapi/reference_utils_test.go

📝 Walkthrough

Walkthrough

The REST API adds bind-aware SQLite batching helpers. Block-trip and active-route lookups reserve capacity for service-ID parameters, validate limits, and use the helpers across affected handlers. Tests cover preserved results and oversized non-batched bind sets.

Changes

Bind-aware REST API batching

Layer / File(s)	Summary
Bind-aware batch helpers internal/restapi/reference_utils.go, internal/restapi/reference_utils_test.go	Batch helpers validate bind counts, handle empty inputs, reserve SQLite bind capacity, and batch block-trip queries. Tests cover result preservation and excessive extra binds.
Batched active-route lookup internal/restapi/stops_for_location_handler.go	Active route queries now account for active service-ID binds when sizing ID batches.
Block-trip handler integration internal/restapi/schedule_for_stop_handler.go, internal/restapi/trips_for_location_handler.go, internal/restapi/trips_for_route_handler.go	Affected handlers now retrieve block trips through tripsByBlockIDs while preserving existing inputs and error handling.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Merge Risk: 🟡 Moderate · up to 44b90

The batching change can return duplicate trip entries when IDs span query batches, producing incorrect route responses. Merge readiness remains moderate until IDs are deduplicated and covered by a regression test.

Suggested reviewers: arcoder181105, ahmedhossamdev, 3rabiii

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Linked Issues check	❓ Inconclusive	The code accounts for fixed and secondary binds, updates affected queries, and adds batching tests, but the required query-success integration test is not shown.	Add or provide a test that executes a query with a sufficiently large service-ID set and a full stop-ID batch, then verifies successful execution.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Out of Scope Changes check	✅ Passed	All changes support bind-aware batching for the affected REST API queries and the linked issue.
Docstring Coverage	✅ Passed	Docstring check was indeterminate for this PR — some files could not be analyzed in time. Not blocking.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: reserving capacity for extra query bind variables.

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[coderabbitai]

Actionable comments posted: 2

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Inline comments:
In `@internal/restapi/reference_utils.go`:
- Around line 540-542: Add a test for the negative extraBinds branch in the
relevant reference utility test suite: invoke the surrounding function with -1,
assert that it returns an error, and verify the query callback is not executed.
- Around line 568-574: Update tripsByBlockIDs to deduplicate blockIDs before
passing them to queryInBatchesWithExtraBinds, preserving one occurrence of each
ID while leaving serviceIDs and query behavior unchanged. Add a regression test
covering a repeated block ID that appears across the batching boundary and
verify duplicate trips are not returned.

🪄 Autofix

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: 15abe485-9a18-43be-b364-4f1e88270076

📥 Commits

Reviewing files that changed from the base of the PR and between 2dd8bea and 44b9051.

📒 Files selected for processing (6)

• internal/restapi/reference_utils.go
• internal/restapi/reference_utils_test.go
• internal/restapi/schedule_for_stop_handler.go
• internal/restapi/stops_for_location_handler.go
• internal/restapi/trips_for_location_handler.go
• internal/restapi/trips_for_route_handler.go

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[soumajitgh]

Sorry, I didn’t notice that this depends on #1317. Closing this for now.