Fix hashing logic for config strings

[JasoonS]

This is my first time using codex, It isn't actually fixing a bug really since the hex can just be a string but I agree it should be should be a proper hex string

Summary

• ensure HashString::from_string uses hex formatting like other hashing helpers
• test string hashing to cover new code path

Testing

• cargo test -p cli --quiet (fails: failed to fetch crates)

---

https://chatgpt.com/codex/tasks/task_e_68530385f0e88327bb4e08463ecfe0cb

Summary by CodeRabbit

• Bug Fixes

  • Improved hash formatting for string inputs to use lowercase hexadecimal, ensuring consistency with other hash outputs.

• Tests

  • Added a unit test to verify correct hashing of the string "config".

[coderabbitai]

Walkthrough

The implementation of the HashString::from_string method was updated to produce a lowercase hexadecimal SHA-256 hash instead of a debug-formatted byte array. A new unit test was also added to verify the correctness of the hash output for a sample string.

Changes

File(s)	Change Summary
codegenerator/cli/src/persisted_state/hash_string.rs	Updated hash formatting in from_string to hex; added a unit test for string hashing

Poem

In the land of hashes, a change took root,
From byte arrays to hex, now elegant and cute.
"config" was tested, its hash shining bright,
Lowercase and tidy, a rabbit’s delight.
With code now more clear, I hop with a cheer!

---

📜 Recent review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 4f1c18a and 10c5814.

📒 Files selected for processing (1)

• codegenerator/cli/src/persisted_state/hash_string.rs (2 hunks)

⏰ Context from checks skipped due to timeout of 90000ms (1)

• GitHub Check: build_and_test

🔇 Additional comments (2)

codegenerator/cli/src/persisted_state/hash_string.rs (2)

55-57: LGTM! Hash formatting fix aligns with existing patterns.

The change correctly fixes the hash formatting to use lowercase hexadecimal ({:x}) instead of debug formatting ({:?}), which aligns with the from_file_paths method on line 43. This ensures consistent hash string representation across all methods.

Please verify that this formatting change doesn't break existing functionality by checking if any other parts of the codebase depend on the old debug format:

#!/bin/bash
# Description: Search for potential dependencies on the old hash format
# Expected: No usage of HashString::from_string output in debug format comparisons

# Search for any hardcoded hash strings that might be in debug format
rg -A 3 -B 3 "HashString.*from_string" --type rust

# Search for any test assertions or comparisons that might expect debug format
rg -A 5 -B 5 "\[.*\]" --type rust | grep -i hash

---

111-118: ```shell
#!/bin/bash

Verify the SHA-256 hash of "config" using Python

python3 - << 'EOF'
import hashlib
print(hashlib.sha256("config".encode()).hexdigest())
EOF

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