Add pipeline orchestration, config, and remove old triage modules

[qu4rkn3t]

Type of change

• Refactor
• New feature
• Bug fix
• Optimization
• Documentation Update

Description

Wires up the full Phase 2 pipeline: gets markdown from JIRA, TODO parse markdown, creates data models, and goes through the stages of Phase 2. Also removes the old analysis_llm.py, filtering.py, and triage_llm.py modules that this replaces, and adds the commit triage README.

Checklist before requesting a review

• I have performed a self-review of my code.
• If it is a core feature, I have added thorough tests.

Testing

Passes tests targeted at features like heuristics (this is just a wrapper so no individual tests). Works on real regression data as well.

[Copilot]

Pull request overview

Adds scaffolding for “Phase 2” commit-triage orchestration and documentation, while removing legacy commit-triage modules. In its current state, the new pipeline module cannot be imported/executed because it references several perf_keeper.commit_triage.* modules that are not present in this PR, and the new README documents files/APIs that don’t exist.

Changes:

• Introduces a new commit_triage pipeline orchestrator (run, run_for_jira) and shared configuration constants/patterns.
• Adds perf_keeper/commit_triage/README.md describing the Phase 2 commit-triage pipeline and usage.
• Removes the legacy triage module stubs/docstrings (analysis_llm.py, filtering.py, triage_llm.py) and the package docstring.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
perf_keeper/commit_triage/triage_llm.py	Removes legacy module content.
perf_keeper/commit_triage/README.md	Adds Phase 2 commit-triage documentation and usage example.
perf_keeper/commit_triage/pipeline.py	Adds Phase 2 pipeline orchestration (heuristics scoring + LLM stages + report).
perf_keeper/commit_triage/filtering.py	Removes legacy module content.
perf_keeper/commit_triage/config.py	Adds shared constants, regexes, and heuristic/config defaults for commit triage.
perf_keeper/commit_triage/analysis_llm.py	Removes legacy module content.
perf_keeper/commit_triage/init.py	Removes package docstring content.

Suppressed comments (3)

perf_keeper/commit_triage/pipeline.py:31

• These imports reference modules/symbols that are not present in the codebase (perf_keeper/commit_triage/heuristics.py, perf_keeper/commit_triage/llm.py). Importing pipeline.py will raise ModuleNotFoundError, so the Phase 2 pipeline cannot run as-is.

from perf_keeper.commit_triage.heuristics import (
    s1_temporal_proximity,
    s2_modification_intensity,
    s3_nesting_depth_shift,
    s4_control_flow_delta,
    s5_change_concentration,
    s6_component_proximity,
    should_discard,
)
from perf_keeper.commit_triage.llm import LLMClient

perf_keeper/commit_triage/pipeline.py:42

• These imports reference additional missing modules (perf_keeper/commit_triage/models.py, perf_keeper/commit_triage/prompts.py). As written, run() cannot be executed because the required types and prompt-building helpers are not available.

from perf_keeper.commit_triage.models import (
    CommitModel,
    FlashResponse,
    FrontierResponse,
    RegressionContext,
)
from perf_keeper.commit_triage.prompts import (
    build_flash_prompts,
    build_frontier_prompts,
    load_all_diffs,
)

perf_keeper/commit_triage/README.md:34

• The usage example imports build_regression_context, make_affected_metric, create_client, GEMINI_FLASH, and GEMINI_PRO, but those symbols/modules are not present in the current perf_keeper.commit_triage package. The example will fail with ImportError unless the missing modules are added or the snippet is updated to match the actual public API.

```python
from perf_keeper.commit_triage.data_acquisition import build_regression_context, make_affected_metric
from perf_keeper.commit_triage.llm import create_client, GEMINI_FLASH, GEMINI_PRO
from perf_keeper.commit_triage import pipeline

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