Enforce max_frames in TLVParser and LegacyParser

[Chayashree-BR]

Summary

Enforces max_frames limit in TLVParser and LegacyParser to prevent excessive frame parsing and improve safety. Ensures consistent behavior across modern and legacy parsing paths.

Type of Change

• Parser or protocol handling
• Validation or diagnostics
• Storage, cache, transport, or worker behavior
• Documentation or tooling
• Test-only change

Checklist

• The change is narrowly scoped.
• Regression tests or fixtures were added for parser/validation fixes.
• Legacy stream behavior is preserved or documented.
• Documentation was updated when public behavior changed.
• pytest and ruff check sigflow tests were run locally when applicable.

[jmestwa-coder]

@Chayashree-BR

resolve the conflicts

[jmestwa-coder]

@Chayashree-BR
LGTM.
Before merge, please add regression tests covering:

• TLVParser stopping at max_frames,
• LegacyParser stopping at max_frames,
• and ensuring the diagnostic warning is emitted consistently.

Also please add the missing trailing newline to the modified files to match repository formatting conventions.

Please squash the changes into a single commit before submission/update.

[jmestwa-coder]

@Chayashree-BR, there are conflicts. resolve it

[jmestwa-coder]

@Chayashree-BR
LGTM. Merging.

[jmestwa-coder]

@Chayashree-BR, Thank you for your contribution.

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