Teach review-prs subagents about non-master base branches
PRs targeting feature branches (not master, not version uplift branches)
were causing false positives: subagents couldn't find symbols/files in the
source tree and incorrectly flagged them as missing, not realising the code
was introduced by the base branch rather than master.
- Add is_feature_branch() using _fp_mod.is_version_branch() for detection
- Pass baseRefName through pr_entry() -> process_pr() -> build_subagent_prompt()
- Inject a NOTE at the top of each subagent prompt when base is a feature
branch, naming the branch and providing the exact gh api lookup command
- Add base branch awareness rule to _REVIEW_RULES
- Add {base_branch_validation_note} placeholder to _VALIDATION_INSTRUCTIONS,
populated with the concrete repo/branch lookup command when applicable
Netzenbot
ea361c39a5