feat(aidd-orchestrator): add an interactive SDLC mode

[blafourcade]

Problem

aidd-orchestrator:01-sdlc currently exposes only an autonomous delivery contract. Teams also need a supervised path for decisions that should remain human-owned without manually interrupting the pipeline.

Product decision

Reintroduce an optional interactive mode. Autonomous mode remains the default.

This deliberately revisits the single autonomous contract introduced by #517. It is not a regression to the former behavior: the new mode adds a small number of decision gates while keeping internal implementation and repair loops autonomous.

Modes

• Autonomous: current behavior remains unchanged.
• Interactive: selected explicitly through user intent, for example “run the SDLC interactively”; no dedicated CLI flag is required.

Interactive gates

1. Contract gate: after Frame produces the delivery contract.
2. Plan gate: after aidd-dev:01-plan produces or revises the implementation plan. Reuse that skill’s approval point; do not add a duplicate gate.
3. Final evidence gate: after Check and applicable QA clear, before creating the draft pull request.

At each gate, present the artifact, material risks, the pending decision, and the next stage.

A rejection sends the feedback back to the artifact owner, then presents the revised gate again. Approved artifacts are resumed without regeneration. Telemetry must represent pauses and resumptions.

Acceptance criteria

• Explicit interactive intent selects interactive mode.
• No explicit mode keeps the current autonomous behavior.
• Interactive mode pauses only at the three defined gates.
• Rejected artifacts are revised by their owning stage and presented again.
• Approved artifacts are reused when the pipeline resumes.
• Implementation, test, review-repair, and QA-repair loops remain autonomous between gates.
• The final gate occurs before draft pull request creation.
• Existing autonomous SDLC tests remain green and interactive-mode coverage is added.
• User-facing SDLC documentation explains both modes and their default.

Prior art

• Interactive orchestration previously existed in commit 8f9e245.
• refactor(orchestrator): replace SDLC actions with protocols #517 and commit ed816044 intentionally removed it in favor of one autonomous contract.
• This issue is the explicit product decision to restore supervised delivery with a narrower gate model.

Out of scope

• Approval after every implementation phase.
• A separate training or tutorial SDLC.
• Changing the autonomous default.