Add eyecatcher log lines at info-level for transaction lifecycle

[peterbroadhurst]

Proposed changes

Add eyecatcher logs such as the following, that can be used as anchors for diagnosing transaction paths.
Particularly for blockchain_invoke transactions, it is important to see when the transaction came in, and correlate that with the connector for the plugin. This means correlating the idempotencyKey (app identifier), transactionId (overall FireFly transaction ID) and operationId (unique ID used with the blockchain connector).

[2025-12-11T17:26:24.742Z]  INFO FF_NEW_TRANSACTION_OPERATION: namespace=default plugin=ethereum type=blockchain_invoke operationId=02cc00a1-ad7f-4b53-b6cd-cbe22614bd4d transactionId=82061ac0-2364-4f03-8d1b-dbe9a0e4b865 idempotencyKey='' batch= dbtx=BnBpmsR1 httpreq=szeEliLI pid=1 req=DAkLlQnQ
[2025-12-11T17:26:24.750Z]  INFO FF_OPERATION_UPDATE: namespace=default plugin=ethereum type=blockchain_invoke status=Pending operationId=02cc00a1-ad7f-4b53-b6cd-cbe22614bd4d transactionId=82061ac0-2364-4f03-8d1b-dbe9a0e4b865 idempotencyKey='' dbtx=jsMMbdLq ns=default pid=1
[2025-12-11T17:26:24.881Z]  INFO FF_OPERATION_UPDATE: namespace=default plugin=ethereum type=blockchain_invoke status=Succeeded operationId=02cc00a1-ad7f-4b53-b6cd-cbe22614bd4d transactionId=82061ac0-2364-4f03-8d1b-dbe9a0e4b865 idempotencyKey='' dbtx=rITEYeqS ns=default pid=1

• Bug fix
• New feature added
• Documentation Update

---

• I have read the contributing guidelines.
• [ x I have performed a self-review of my own code or work.
• I have commented my code, particularly in hard-to-understand areas.
• My changes generates no new warnings.
• I have added tests that prove my fix is effective or that my feature works.
• My changes have sufficient code coverage (unit, integration, e2e tests).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.96%. Comparing base (de1f917) to head (b5e0379).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1711   +/-   ##
=======================================
  Coverage   99.96%   99.96%           
=======================================
  Files         342      342           
  Lines       25015    25022    +7     
=======================================
+ Hits        25007    25014    +7     
  Misses          4        4           
  Partials        4        4           

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[EnriqueL8]

Thanks @peterbroadhurst - this is useful!

[EnriqueL8]

BTW incase anyone else looks at this, IdempotencyKey is not a pointer just a string type so safe to cast to string

[EnriqueL8]

E2E has failed because the test WS disconnect from FireFly second instance and didn't receive the token_pool_confirmed event

2025-12-11T17:48:56.5583214Z Websocket 127.0.0.1:5001 closing, error: websocket: close 1006 (abnormal closure): unexpected EOF

Created issue for it #1712

[EnriqueL8]

E2E was failing due to the following which is explained by candidate being nil so pushed a commit with fix

firefly_e2e_firefly_core_1  | [2025-12-11T18:03:49.935Z]  WARN SQL! transaction rollback dbtx=yt6AHZ1u ns=default pid=1
firefly_e2e_firefly_core_1  | panic: runtime error: invalid memory address or nil pointer dereference
firefly_e2e_firefly_core_1  | [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xc6a10a]
firefly_e2e_firefly_core_1  | 
firefly_e2e_firefly_core_1  | goroutine 626 [running]:
firefly_e2e_firefly_core_1  | github.com/hyperledger/firefly/internal/operations.(*operationUpdater).doUpdate(0xc0001fe3c0, {0x13c7fd8, 0xc000e9c1e0}, 0xc00047a480, {0xc000122ea8, 0x1, 0x0?}, {0xc000122ec8, 0x1, 0x1})
firefly_e2e_firefly_core_1  | 	/firefly/internal/operations/operation_updater.go:318 +0x6ca
firefly_e2e_firefly_core_1  | github.com/hyperledger/firefly/internal/operations.(*operationUpdater).doBatchUpdate(0xc0001fe3c0, {0x13c7fd8, 0xc000e9c1e0}, {0xc000122e80, 0x1, 0x0?})