Fix codecov comment step failing on workflow_dispatch

[joshuacolvin0]

The codecov/basic-test-results action requires a PR context to post
comments. Guard the step so it only runs on pull_request events.

Co-Authored-By: Claude Opus 4.6 (1M context) noreply@anthropic.com

[KolbyML]

looks good

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 34.32%. Comparing base (fd2a5b0) to head (4fdddf8).
⚠️ Report is 11 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4562      +/-   ##
==========================================
- Coverage   34.35%   34.32%   -0.03%     
==========================================
  Files         498      498              
  Lines       58977    58977              
==========================================
- Hits        20262    20246      -16     
- Misses      35137    35147      +10     
- Partials     3578     3584       +6     

[github-actions]

❌ 7 Tests Failed:

Tests completed	Failed	Passed	Skipped
4629	7	4622	0

View the top 3 failed tests by shortest run time

TestAliasingFlaky

Stack Traces | -0.000s run time

... [CONTENT TRUNCATED: Keeping last 20 lines]
INFO [03-27|19:31:47.311] Imported new potential chain segment     number=47 hash=4f9162..ec49d9 blocks=1  txs=1  mgas=0.021 elapsed="528.977µs" mgasps=39.699   triediffs=224.12KiB triedirty=0.00B
INFO [03-27|19:31:47.311] Chain head was updated                   number=47 hash=4f9162..ec49d9 root=3b2405..b483cf elapsed="41.938µs"
INFO [03-27|19:31:47.312] Ethereum protocol stopped
INFO [03-27|19:31:47.312] Transaction pool stopped
INFO [03-27|19:31:47.312] Starting work on payload                 id=0x03f3c2f3289a03e7
INFO [03-27|19:31:47.312] Updated payload                          id=0x03f3c2f3289a03e7                      number=48 hash=975380..f3bbef txs=0  withdrawals=0 gas=0         fees=0              root=cf215a..1b2aab elapsed="213.268µs"
INFO [03-27|19:31:47.312] Stopping work on payload                 id=0x03f3c2f3289a03e7                      reason=delivery
INFO [03-27|19:31:47.312] Imported new potential chain segment     number=48 hash=975380..f3bbef blocks=1  txs=0  mgas=0.000 elapsed="364.051µs" mgasps=0.000    triediffs=227.24KiB triedirty=0.00B
INFO [03-27|19:31:47.312] Chain head was updated                   number=48 hash=975380..f3bbef root=cf215a..1b2aab elapsed="25.057µs"
INFO [03-27|19:31:47.313] Imported new potential chain segment     number=34 hash=5c8e03..5b5045 blocks=1  txs=1  mgas=2.822 elapsed=1.878ms     mgasps=1501.939 triediffs=181.46KiB triedirty=0.00B
INFO [03-27|19:31:47.313] Persisting dirty state                   head=33 root=22ad1a..98db2c layers=33
WARN [03-27|19:31:47.313] Error performing sealing work            err="blockchain is stopped"
INFO [03-27|19:31:47.313] Submitted transaction                    hash=0x4d6064e44c7537bf33cf00d602fad132637ea9f1a2c03b60004b0ee87265d2db from=0xaF24Ca6c2831f4d4F629418b50C227DF0885613A nonce=7  recipient=0xaF24Ca6c2831f4d4F629418b50C227DF0885613A value=1,000,000,000,000
INFO [03-27|19:31:47.313] Starting work on payload                 id=0x0334ccc0091c60f9
INFO [03-27|19:31:47.313] Updated payload                          id=0x0334ccc0091c60f9                      number=49 hash=934716..644f81 txs=1  withdrawals=0 gas=21000     fees=0.002094555426 root=8fc044..c9624d elapsed="323.584µs"
INFO [03-27|19:31:47.314] Persisted dirty state to disk            size=162.75KiB elapsed=1.082ms
INFO [03-27|19:31:47.314] Stopping work on payload                 id=0x0334ccc0091c60f9                      reason=delivery
INFO [03-27|19:31:47.314] Blockchain stopped
INFO [03-27|19:31:47.314] Imported new potential chain segment     number=49 hash=934716..644f81 blocks=1  txs=1  mgas=0.021 elapsed="540.248µs" mgasps=38.871   triediffs=231.23KiB triedirty=0.00B
INFO [03-27|19:31:47.314] Chain head was updated                   number=49 hash=934716..644f81 root=8fc044..c9624d elapsed="22.171µs"

TestBatchPosterL1SurplusMatchesBatchGasFlaky

Stack Traces | 0.550s run time

... [CONTENT TRUNCATED: Keeping last 20 lines]
panic: runtime error: invalid memory address or nil pointer dereference [recovered, repanicked]
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x2079f52]

goroutine 16 [running]:
testing.tRunner.func1.2({0x37dd320, 0x61ec9b0})
	/opt/hostedtoolcache/go/1.25.8/x64/src/testing/testing.go:1872 +0x237
testing.tRunner.func1()
	/opt/hostedtoolcache/go/1.25.8/x64/src/testing/testing.go:1875 +0x35b
panic({0x37dd320?, 0x61ec9b0?})
	/opt/hostedtoolcache/go/1.25.8/x64/src/runtime/panic.go:783 +0x132
github.com/offchainlabs/nitro/arbnode.(*InboxTracker).GetBatchCount(0x14f85900?)
	/home/runner/work/nitro/nitro/arbnode/inbox_tracker.go:210 +0x12
github.com/offchainlabs/nitro/arbnode.(*InboxTracker).FindInboxBatchContainingMessage(0x0, 0x8)
	/home/runner/work/nitro/nitro/arbnode/inbox_tracker.go:225 +0x2f
github.com/offchainlabs/nitro/system_tests.TestBatchPosterL1SurplusMatchesBatchGasFlaky(0xc000503180)
	/home/runner/work/nitro/nitro/system_tests/batch_poster_test.go:838 +0x725
testing.tRunner(0xc000503180, 0x41ae150)
	/opt/hostedtoolcache/go/1.25.8/x64/src/testing/testing.go:1934 +0xea
created by testing.(*T).Run in goroutine 1
	/opt/hostedtoolcache/go/1.25.8/x64/src/testing/testing.go:1997 +0x465

TestAnyTrustRekey

Stack Traces | 23.070s run time

... [CONTENT TRUNCATED: Keeping last 20 lines]
        testing.tRunner(0xc0004008c0, 0x44c0740)
        	/opt/hostedtoolcache/go/1.25.8/x64/src/testing/testing.go:1934 +0xea
        created by testing.(*T).Run in goroutine 1
        	/opt/hostedtoolcache/go/1.25.8/x64/src/testing/testing.go:1997 +0x465
        
INFO [03-27|19:37:09.635] Starting work on payload                 id=0x0326b41a1b6b7f61
INFO [03-27|19:37:09.636] Imported new potential chain segment     number=176 hash=c0b63d..1ebd64 blocks=1  txs=1   mgas=0.021  elapsed=1.646ms      mgasps=12.751   triediffs=680.86KiB triedirty=62.33KiB
INFO [03-27|19:37:09.636] Chain head was updated                   number=176 hash=c0b63d..1ebd64 root=0261e4..806c6b elapsed="107.27µs"
    common_test.go:983: �[31;1m [failed to deploy ArbDebug] nonce too low: address 0x26E554a8acF9003b83495c7f45F06edCB803d4e3, tx: 1 state: 3 �[0;0m
WARN [03-27|19:37:09.637] error getting max time variation on L1 bound block; falling back on latest block err="context canceled"
--- FAIL: TestAnyTrustRekey (23.07s)
INFO [03-27|19:37:09.639] Updated payload                          id=0x0326b41a1b6b7f61 number=114 hash=dcf285..3baa8f txs=1   withdrawals=0 gas=21000      fees=0.002099999042 root=60ec39..648c45 elapsed=2.919ms
WARN [03-27|19:37:09.640] Sequencer ReadFromTxQueueTimeout is higher than MaxBlockSpeed ReadFromTxQueueTimeout=1s MaxBlockSpeed=10ms
WARN [03-27|19:37:09.640] Sanitizing invalid node buffer size      provided=1024.00MiB updated=256.00MiB
INFO [03-27|19:37:09.640] Load database journal from disk
INFO [03-27|19:37:09.641] State snapshot generator is not found
INFO [03-27|19:37:09.641] Starting snapshot generation             root=56e81f..63b421 accounts=0 slots=0 storage=0.00B dangling=0 elapsed="3.827µs"
INFO [03-27|19:37:09.641] Initialized path database                triecache=600.00MiB statecache=400.00MiB buffer=256.00MiB state-history="last 345600 blocks"
INFO [03-27|19:37:09.642] addresss table import complete
INFO [03-27|19:37:09.642] retryables import complete

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