fix(deps): bump github.com/opentdf/platform/protocol/go from 0.5.0 to 0.5.1 in /sdk [backport to release/sdk/v0.5]

[opentdf-automation]

Description

Backport of #2505 to release/sdk/v0.5.

[opentdf-automation]

Please cherry-pick the changes locally and resolve any conflicts.

git fetch origin backport-2505-to-release/sdk/v0.5
git worktree add --checkout .worktree/backport-2505-to-release/sdk/v0.5 backport-2505-to-release/sdk/v0.5
cd .worktree/backport-2505-to-release/sdk/v0.5
git reset --hard HEAD^
git cherry-pick -x 4edab72fa06c182c987d2b85fba3f5efea251ce4
git push --force-with-lease

[github-actions]

Benchmark results, click to expand

Benchmark authorization.GetDecisions Results:

Metric	Value
Approved Decision Requests	5000
Denied Decision Requests	0
Total Time	561.27671ms

Benchmark authorization.v2.GetMultiResourceDecision Results:

Metric	Value
Approved Decision Requests	5000
Denied Decision Requests	0
Total Time	350.874409ms

Standard Benchmark Metrics Skipped or Failed

Bulk Benchmark Results

Metric	Value
Total Decrypts	100
Successful Decrypts	100
Failed Decrypts	0
Total Time	360.905962ms
Throughput	277.08 requests/second

TDF3 Benchmark Results:

Metric	Value
Total Requests	5000
Successful Requests	5000
Failed Requests	0
Concurrent Requests	50
Total Time	37.839949077s
Average Latency	375.627764ms
Throughput	132.14 requests/second

NANOTDF Benchmark Results:

Metric	Value
Total Requests	5000
Successful Requests	5000
Failed Requests	0
Concurrent Requests	50
Total Time	26.424767492s
Average Latency	263.172544ms
Throughput	189.22 requests/second