fix(events): make ReactionUpdateEvent counters/total_count optional

[sau7777]

Problem

ReactionUpdateEvent declares counters and total_count as required. But when a reaction is removed, the server emits NOTIF_MSG_REACTIONS_CHANGED (opcode 155) without a counters field (and total_count 0):

{"chatId": 531302608, "totalCount": 0, "messageId": "116781851510470562"}

This raises a ValidationError in EventMapper.map → RuntimeError: Failed to dispatch inbound frame, so reaction-removal events never reach on_reaction_update, and every removal spams the logs with a traceback:

ReactionUpdateEvent
counters
  Field required [type=missing, input_value={'chatId': ..., 'totalCount': 0, 'messageId': ...}]

Observed live on a linked-device session (real account, June 2026): add a reaction → OP155 with counters; remove it → OP155 without counters → crash.

Fix

Default counters to an empty list and total_count to 0, so removal frames validate cleanly — an empty counters simply signals "reaction removed".

Notes

• Backward compatible: add/update frames (with counters) are unaffected.
• Verified against the real removal payload (validates, counters == []) and a normal add payload (parses counters as before).

Summary by CodeRabbit

• Bug Fixes
  • Improved reaction event handling by adding sensible default values for reaction counters and total count, ensuring the system gracefully handles reaction data without requiring all fields to be explicitly provided.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 9bc582e4-c047-4f58-9cae-4f7a2e2c06a0

📥 Commits

Reviewing files that changed from the base of the PR and between 8c40b71 and 2bf6bf8.

📒 Files selected for processing (1)

• src/pymax/types/events/reaction.py

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📝 Walkthrough

Walkthrough

In src/pymax/types/events/reaction.py, Field is imported from pydantic and ReactionUpdateEvent's counters field is given a default of Field(default_factory=list) while total_count defaults to 0, making both fields optional at instantiation.

Changes

ReactionUpdateEvent optional field defaults

Layer / File(s)	Summary
Optional field defaults for ReactionUpdateEvent src/pymax/types/events/reaction.py	Adds Field import from pydantic; changes counters to Field(default_factory=list) and total_count to = 0, with updated docstring reflecting optional semantics.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐇 A rabbit once needed no count,
For reactions could mount or not mount.
With a zero in place,
And a list full of grace,
Defaults now remove the old doubt!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main change: making ReactionUpdateEvent counters/total_count optional with default values.
Description check	✅ Passed	The description provides clear problem statement, root cause, fix explanation, and backward compatibility notes; follows the template structure with comprehensive details.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[ink-developer]

Спасибо за PR но есть пару недочетов
Описал их в ревью