chore: update copyright header to CNCF format in proto directory

[JeevaRamanathan]

Summary

Updates Apache License old copyright headers to Copyright Contributors to Agones a Series of LF Projects, LLC. as per the CNCF Copyright Notices guidelines.

This PR covers Go source files in the proto/ directory covering 12 files.

Closes partially: #4514

Test plan

• Verified all old copyright headers in target directories have been replaced
• Verified no other lines were modified (each file has exactly headers line changed)
• Both comment styles handled: // and /* */

[igooch]

/gcbrun

[agones-bot]

Build Failed 😭

Build Id: 92736138-25f6-406d-9be6-0b164feeeefa

Status: FAILURE

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[igooch]

/gcbrun

[agones-bot]

Build Failed 😭

Build Id: e26a971e-2f5c-40eb-92c8-28bbbcb48257

Status: FAILURE

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[igooch]

Try running make gen-all-sdk-grpc

[markmandel]

/gcbrun

I'm kinda curious if the current set of copyright notice updates may have kinda solved this failure 😄

[agones-bot]

Build Failed 😭

Build Id: ba296277-de72-4d9a-828c-2de8d2c99a81

Status: FAILURE

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[markmandel]

Yeah, this will need a make gen-all-sdk-grpc and then push back up with the updates.

[markmandel]

Hope you don't mind 😄 I took the liberty of running make gen-all-sdk-grpc since it takes a while and builds a stack of docker images.

[markmandel]

/gcbrun

[agones-bot]

Build Failed 😭

Build Id: 88e4cd26-23f5-433a-9968-0e3f6b9465a6

Status: FAILURE

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[markmandel]

Flake:
https://console.cloud.google.com/cloud-build/builds/18b1a2c5-8574-42b7-b6cf-191b20ac89d5;step=1?project=agones-images

VERBOSE: time="2026-04-26 01:43:16.501" level=info msg="Checking Fleet Ready replicas" expected=150 fleet=preferred-dvl8g fleetStatus="{Replicas:150 ReadyReplicas:150 ReservedReplicas:0 AllocatedReplicas:0 Players:0xc0004ec420 Counters:map[] Lists:map[]}" test=TestGameServerAllocationDuringMultipleAllocationClients
VERBOSE: time="2026-04-26 01:43:16.502" level=info msg="Scaling fleet" fleet=preferred-dvl8g patch="[{ \"op\": \"replace\", \"path\": \"/spec/replicas\", \"value\": 130 }]" scale=130
VERBOSE: time="2026-04-26 01:43:16.620" level=info msg="Starting 100 allocation attempts" test=TestGameServerAllocationDuringMultipleAllocationClients
VERBOSE: time="2026-04-26 01:43:17.621" level=info msg="Scaling Fleet down by 10 replicas" test=TestGameServerAllocationDuringMultipleAllocationClients
VERBOSE: time="2026-04-26 01:43:17.621" level=info msg="Scaling fleet" fleet=preferred-dvl8g patch="[{ \"op\": \"replace\", \"path\": \"/spec/replicas\", \"value\": 120 }]" scale=120
VERBOSE: time="2026-04-26 01:43:18.975" level=info msg="Allocation error: an error on the server (\"could not update the selected GameServer\") has prevented the request from succeeding (post gameserverallocations.allocation.agones.dev)" test=TestGameServerAllocationDuringMultipleAllocationClients
VERBOSE: I0426 01:43:19.022727   10614 request.go:752] "Waited before sending request" delay="1.053439727s" reason="client-side throttling, not priority and fairness" verb="POST" URL="https://35.237.51.105/apis/allocation.agones.dev/v1/namespaces/1777167759/gameserverallocations"
VERBOSE: time="2026-04-26 01:43:27.000" level=info msg="Allocation error: an error on the server (\"could not update the selected GameServer\") has prevented the request from succeeding (post gameserverallocations.allocation.agones.dev)" test=TestGameServerAllocationDuringMultipleAllocationClients
VERBOSE: I0426 01:43:29.222652   10614 request.go:752] "Waited before sending request" delay="1.241340261s" reason="client-side throttling, not priority and fairness" verb="POST" URL="https://35.237.51.105/apis/allocation.agones.dev/v1/namespaces/1777167759/gameserverallocations"
VERBOSE: time="2026-04-26 01:43:29.519" level=info msg="Allocation error: an error on the server (\"could not update the selected GameServer\") has prevented the request from succeeding (post gameserverallocations.allocation.agones.dev)" test=TestGameServerAllocationDuringMultipleAllocationClients
VERBOSE: time="2026-04-26 01:43:35.059" level=info msg="Finished allocation attempts" test=TestGameServerAllocationDuringMultipleAllocationClients
VERBOSE:     gameserverallocation_test.go:1479: Test failed: Less than 98 GameServers were allocated. Allocated: 97
VERBOSE: --- FAIL: TestGameServerAllocationDuringMultipleAllocationClients (54.82s)

/gcbrun

[markmandel]

/gcbrun

[agones-bot]

Build Failed 😭

Build Id: f1491641-e6a7-4e50-8268-d039f361e0c3

Status: FAILURE

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[markmandel]

/gcbrun

[agones-bot]

Build Failed 😭

Build Id: 21b4ccba-705b-49c4-8123-0ae746254fd5

Status: FAILURE

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[markmandel]

/gcbrun