feat(account): add __str__ and __repr__ to AccountInfo

[Akshat8510]

Description:
This PR improves the developer experience by adding __repr__ and __str__ methods to the AccountInfo class. Previously, printing an AccountInfo object resulted in a generic object representation (e.g., <AccountInfo object at 0x...>). Now, it provides a human-readable summary (__str__) and a detailed debugging representation (__repr__).

• Add __repr__ method to AccountInfo for detailed debugging output.
• Add __str__ method to AccountInfo for a user-friendly summary of account details.
• Update tests/unit/account_info_test.py to verify the new string representations.
• Update examples/account/account_info.py to demonstrate the improved output.

Related issue(s):

Fixes #1098

Notes for reviewer:
Here is the verified output from the updated example script examples/account/account_info.py:

📜 AccountInfo String Representation:
Account ID: 0.0.1234
Balance: 100.00000000 ℏ
Key: <PublicKey (ECDSA) hex=0361a4ff482f7020a58d2519dcc459e39e0019760744b86ea4a2d8942658273b6d>
Memo: Mock Account for Example
Expiration Time: 1736539200.000000100
Auto Renew Period: Duration of 7776000 seconds.
Token Relationships: 1

Checklist

• Documented (Code comments, README, etc.)
• Tested (unit)

Summary by CodeRabbit

• New Features

  • Account information now includes human-readable and debug string representations showing key details (ID, balance, memo, NFT count and relevant status) for clearer logging and debugging.

• Tests

  • Added unit tests validating the new user-facing and debug string representations.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

Walkthrough

Adds str and repr methods to AccountInfo, updates an example to print AccountInfo directly, documents the change in CHANGELOG, and adds a unit test verifying both string representations.

Changes

Cohort / File(s)	Summary
Changelog CHANGELOG.md	Documents the addition of __str__ and __repr__ methods to AccountInfo.
Core implementation src/hiero_sdk_python/account/account_info.py	Adds def __str__(self) -> str producing a multi-line, conditional summary of AccountInfo fields and def __repr__(self) -> str returning a concise constructor-like representation. No changes to serialization/deserialization or other behaviors.
Example examples/account/account_info.py	Replaces field-by-field printing in print_account_info() with print(info) to rely on the new __str__ output.
Tests tests/unit/account_info_test.py	Adds test_str_and_repr(account_info) asserting expected substrings appear in __str__() and __repr__() outputs.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

• Inspect __str__() formatting and conditional inclusion of optional fields (is_deleted, receiver_signature_required, decline_staking_reward, token_relationships count).
• Verify __repr__() includes appropriate, non-sensitive fields and uses a clear constructor-like form.
• Confirm example change and test assertions align with the new string formats.

Poem

🐰 I hop through bytes with joyful cheer,

AccountInfo now reads so clear.
No cryptic hex, no mystery map,
Just friendly lines for every app.
A rabbit's nod — the logs clap clap!

Pre-merge checks and finishing touches

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and accurately summarizes the main change: adding str and repr methods to the AccountInfo class.
Linked Issues check	✅ Passed	The PR implements all required objectives from #1098: repr and str methods added to AccountInfo with appropriate formatting, unit tests added, and examples updated to demonstrate the new string representations.
Out of Scope Changes check	✅ Passed	All changes are directly related to implementing str and repr for AccountInfo as specified in #1098; no unrelated modifications are present.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

---

📜 Recent review details

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Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 09a99f5 and 9f30776.

📒 Files selected for processing (1)

• CHANGELOG.md (1 hunks)

🚧 Files skipped from review as they are similar to previous changes (1)

• CHANGELOG.md

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• GitHub Check: Codacy Static Code Analysis
• GitHub Check: build-and-test (3.13)
• GitHub Check: build-and-test (3.10)
• GitHub Check: build-and-test (3.12)
• GitHub Check: build-and-test (3.11)
• GitHub Check: run-examples
• GitHub Check: StepSecurity Harden-Runner

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[codecov]

Codecov Report

❌ Patch coverage is 85.71429% with 2 lines in your changes missing coverage. Please review.

@@            Coverage Diff             @@
##             main    #1129      +/-   ##
==========================================
+ Coverage   91.04%   91.08%   +0.03%     
==========================================
  Files         139      139              
  Lines        8409     8423      +14     
==========================================
+ Hits         7656     7672      +16     
+ Misses        753      751       -2     

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[exploreriii]

@coderabbitai review

[coderabbitai]

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Review triggered.

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[MonaaEid]

Really good work!

[exploreriii]

Hi this si still in draft, is it ready to review once rebased?

[exploreriii]

Thank you so much @Akshat8510 and @MonaaEid !