Add radix merge logic to CTOptimizedTrie deletion

[HossamSaberr]

As discussed in issue #11, this PR adds a reproducible test case in CTOptimizedTrieTest.

Currently, the test fails because CTOptimizedTrie does not merge a parent and child node when a deletion leaves an intermediate node with only one child. This confirms the structural degradation and memory bloat.

[HossamSaberr]

Hey @jordanmontt, I've just pushed the fix to this same PR.
and it Green now

---

It overrides compressNode:ancestors: in CTOptimizedTrie to securely merge an intermediate node with its single child when a deletion leaves it redundant. This restores the Radix tree structure and makes the test pass locally. Let me know what you think.

[jordanmontt]

we should not use ifabsent in this case

self assert: (trie at: 'car') equals: 1.

[jordanmontt]

Could you add some tests to test this method #compressNode:ancestors:

[HossamSaberr]

Will do. I'm working on these <3

[jordanmontt]

Good PR! It just needs some more tests. I left a review

[HossamSaberr]

Updates pushed. Added tests and fixed the assertion.

[jordanmontt]

There is still no test that tests directly the compressNode:ancestors: method. We need some unit tests that test only that method and calling it directly :)

[HossamSaberr]

Done, Let me know if this looks good!

[github-actions]

Pull Request Test Coverage Report for Build 22639616922

Details

• 19 of 19 (100.0%) changed or added relevant lines in 1 file are covered.
• 5 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.6%) to 80.0%

---

Files with Coverage Reduction	New Missed Lines	%
src/Containers-Trie/CTOptimizedTrieNode.class.st	5	84.17%

Totals
Change from base Build 22344752276:	0.6%
Covered Lines:	376
Relevant Lines:	470

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 22639616922

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 19 of 19 (100.0%) changed or added relevant lines in 1 file are covered.
• 5 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.6%) to 80.0%

---

Files with Coverage Reduction	New Missed Lines	%
src/Containers-Trie/CTOptimizedTrieNode.class.st	5	84.17%

Totals
Change from base Build 22344752276:	0.6%
Covered Lines:	376
Relevant Lines:	470

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 22639616922

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 19 of 19 (100.0%) changed or added relevant lines in 1 file are covered.
• 5 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.6%) to 80.0%

---

Files with Coverage Reduction	New Missed Lines	%
src/Containers-Trie/CTOptimizedTrieNode.class.st	5	84.17%

Totals
Change from base Build 22344752276:	0.6%
Covered Lines:	376
Relevant Lines:	470

---

💛 - Coveralls