RSPEED-2521: include today's date in rlsapi v1 system prompt

[major]

Description

Include today's date in the rlsapi v1 system prompt so the LLM has temporal awareness for date-sensitive questions (e.g., "when does RHEL 9 reach end of life?"). This matches the existing pattern in rlsapi, where the date is formatted as "%B %d, %Y" and injected into the system prompt context.

_build_instructions() now always appends Today's date: March 03, 2026 as a separate line between the base prompt and the User's system: context block.

Type of change

• New feature

Tools used to create PR

• Assisted-by: Claude (opencode)
• Generated by: N/A

Related Tickets & Documents

• RSPEED-2521

Checklist before requesting a review

• I have performed a self-review of my code.
• PR has passed all pre-merge test jobs.
• If it is a core feature, I have added thorough tests.

Testing

1. uv run pytest tests/unit/app/endpoints/test_rlsapi_v1.py -x -q (33 tests pass)
2. uv run make format (clean)
3. uv run make verify (all linters pass, mypy clean)
4. Verified the date regex pattern Today's date: \w+ \d{2}, \d{4} matches in all _build_instructions test cases

Summary by CodeRabbit

• New Features
  • LLM prompts now automatically include today's date to provide better temporal context for AI-generated responses.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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Review profile: CHILL

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📥 Commits

Reviewing files that changed from the base of the PR and between e07897c and 7b6503e.

📒 Files selected for processing (2)

• src/app/endpoints/rlsapi_v1.py
• tests/unit/app/endpoints/test_rlsapi_v1.py

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Walkthrough

The PR modifies the _build_instructions function in the RLS API endpoint to include the current date in the system prompt sent to the LLM. Date information is appended regardless of whether custom system information is present.

Changes

Cohort / File(s)	Summary
Core Implementation src/app/endpoints/rlsapi_v1.py	Added datetime import and updated _build_instructions to append "Today's date: " to the prompt, with the date formatted as Month DD, YYYY. Date is included both when system info is absent and when it's present.
Unit Tests tests/unit/app/endpoints/test_rlsapi_v1.py	Updated test_build_instructions and test_build_instructions_no_customization to verify the date string is present in the output, replacing exact equality checks with string prefix and inclusion assertions.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• RSPEED-2408: fix(rlsapi): use customization.system_prompt in /v1/infer #1125: Modifies the same _build_instructions function to update system prompt selection via configuration, creating a potential merge conflict or interaction point with this date-inclusion feature.

Suggested reviewers

• tisnik

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and specifically describes the main change: adding today's date to the rlsapi v1 system prompt.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

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[tisnik]

Ok. I'm a bit worried about now() and not utcnow() or today() but I guess this is exactly what you need

[major]

@tisnik The date doesn't have to be super precise for this particular use case. ;)