Simplification Phase 2: pipeline inline, data param, ADR archive, adoption rename

[patrick204nqh]

Summary

Code simplification pass across the codebase. Net: -2685 lines across 216 files.

Changes

API: body/content → data (hard cut)

• put and propose verbs now accept a single data parameter
• data is a String → body (markdown/text), Hash → content (json/yaml)
• Old body/`content` params removed from verb specs and handlers

Pipeline restructuring (-31 files)

• Inlined 28 step files into 3 files (delete.rb, move.rb, put.rb)
• Removed Pipeline::*Context structs
• Simplified Pipeline.emit_event and Pipeline.check_etag

ADR consolidation (-22 files)

• Archived 116 pre-v4 ADRs to docs/architecture/archive/
• Deleted 22 superseded ADRs, replaced with stubs
• Updated decisions.md and README links

feedback → adoption rename

• Renamed knowledge.loop.feedback → knowledge.loop.adoption
• Updated manifest, boot workflow, and all code references

Boot improvements

• Added agent_protocol.discipline — permission boundary guidance
• Added workflow_tips — 4 common agent workflow patterns
• Added entry_blueprints — dynamically derived from manifest
• Fixed loop nodes to show adoption

Other

• Flattened publish/ directory
• Removed dead workflow/helpers.rb
• Removed dead methods from protocol/links.rb
• Refactored check_type! (cognitive 81 → dispatch hash)
• Reduced AuditFilter#call from 9 params to 3
• Derived workflow_registry internally in Container (-1 param)

Stats

• 216 files changed
• 1065 insertions, 3750 deletions
• All 1070 tests pass, 0 rubocop offenses