Restructure softwaredev ways into taxonomy with expanded semantic matching

[aaronsb]

Summary

• Reorganize flat softwaredev/ (20 ways) into five clusters: architecture/, code/, delivery/, environment/, docs/
• Add BM25 semantic matching to 11 regex-only ways, expanding coverage from 7 to 18 semantically-scored ways
• Expand activation test from 6 to 8 test steps covering newly-semantic ways and co-activation
• Fix all path references (symlinks, docs, hook comments, test harnesses)

Motivated by well-engineered-repos analysis identifying coverage gaps when the softwaredev ways are measured against a comprehensive repository documentation model.

Taxonomy

softwaredev/
├── architecture/   (adr, adr-context, design)
├── code/           (errors, performance, quality, security, testing)
├── delivery/       (commits, github, migrations, patches, release)
├── environment/    (config, debugging, deps, ssh)
└── docs/           (docs parent, api child)

Test results

Metric	Before	After
Semantic ways	7	18
Fixture accuracy	26/32 (81%)	48/54 (89%)
Fixture FP	0	0
Integration accuracy	27/31	27/31
Integration FP	0	0
Activation test steps	6	8

Follow-up issues

• Add co-activation quality testing for way matching #27 — Co-activation quality testing
• Author new softwaredev ways: threat-modeling, standards, RFC expansion #28 — New way content: threat-modeling, standards, RFC expansion
• Tune vocabulary for newly-semantic ways via real session data #29 — Vocabulary tuning from real session data

Test plan

• Fixture tests pass (48/54, 0 FP)
• Integration tests pass (27/31, 0 FP)
• ADR tool symlink works (docs/scripts/adr list)
• No stale path references (except legacy ADR-013, intentionally untouched)
• Run activation test in fresh session (steps 4 and 5 are new)