perf(database): ⚡ add missing indexes for workspace queries

[yacosta738]

⚡ Performance Optimization

🏗️ Stack: Backend

💡 What Changed

• Added database indexes on workspaces(owner_id) and workspace_members(user_id).
• Files modified: server/engine/src/main/resources/db/changelog/migrations/03-workspace/003d-add-workspace-indexes.yaml
• Journal updated: .agents/journal/bolt-journal.md

🎯 Why It Was Necessary

• Workspace retrieval queries were lacking proper indexes on foreign keys used in filters.
• findByOwnerId and findByMemberId were potentially performing Sequential Scans.
• Improving these queries speeds up user login and dashboard loading.

📊 Performance Impact

Before:

• workspaces(owner_id) lookup: Sequential Scan (O(N))
• workspace_members(user_id) lookup: Sequential Scan (O(N))

After:

• workspaces(owner_id) lookup: Index Scan (O(log N))
• workspace_members(user_id) lookup: Index Scan (O(log N))

Improvement:

• Significant reduction in query time for workspace lookups as table size grows.
• Improved scalability for the workspace management module.

🔬 How to Verify

Run verification:

./gradlew :server:engine:build -x test

Benchmark:
Theoretical improvement based on PostgreSQL query execution patterns.

✅ Verification Checklist

• Backend build passes ✅
• Correct Liquibase migration format
• Correct rollback block included
• Journal entry updated

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PR created automatically by Jules for task 3689753327032507239 started by @yacosta738

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch perf-workspace-indexes-3689753327032507239

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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

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

None

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Deploying cvix with    Cloudflare Pages

Latest commit:	cce3c94
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View logs

[github-actions]

Qodana for JVM

142 new problems were found

Inspection name	Severity	Problems
Invalid @ConfigurationProperties	🔴 Failure	1
Invalid YAML configuration	🔴 Failure	1
Unused symbol	🔶 Warning	48
Invalid YAML configuration	🔶 Warning	40
Unresolved reference in KDoc	🔶 Warning	5
Taint analysis	🔶 Warning	4
Potentially ambiguous 'kotlin.coroutine.coroutineContext' usage	🔶 Warning	4
Unused import directive	🔶 Warning	1
Redundant character escape	🔶 Warning	1
Vulnerable declared dependency	🔶 Warning	1
Duplicated code fragment	◽️ Notice	12
Unknown HTTP header	◽️ Notice	10
Redundant interpolation prefix	◽️ Notice	4
Vulnerable declared dependency	◽️ Notice	3
Multi-dollar interpolation can be used in string literals (available since 2.1)	◽️ Notice	1
Redundant escaped dollar characters in string literals	◽️ Notice	1
String concatenation that can be converted to string template	◽️ Notice	1
If-Null return/break/... foldable to '?:'	◽️ Notice	1
Redundant empty initializer block	◽️ Notice	1
Unnecessary type argument	◽️ Notice	1
'substring' call should be replaced with 'take' call	◽️ Notice	1

☁️ View the detailed Qodana report

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[github-actions]

Test Results

217 files  217 suites   3m 50s ⏱️
981 tests 981 ✅ 0 💤 0 ❌
985 runs  985 ✅ 0 💤 0 ❌

Results for commit cce3c94.