feat: network-scoped USER.md and NETWORK.md for multisite

[chubes4]

Summary

• USER.md is now network-scoped on multisite — resolves to main site's uploads dir instead of per-site paths. Single-site behavior unchanged.
• New NETWORK.md — auto-generated multisite topology file (sites table, network plugins, shared resources) at a new network layer.
• Migration consolidates existing per-site USER.md files to the network location, keeping the richest copy.

Changes across 9 files

File	What changed
DirectoryManager.php	get_user_directory() uses new get_network_base_directory() on multisite; added get_network_directory()
MemoryFileRegistry.php	Added LAYER_NETWORK constant and validation
CoreMemoryFilesDirective.php	Network layer in $layer_dirs map
MemoryFilesReader.php	Network layer in $layer_dirs map
AgentFileAbilities.php	Network layer case in resolveLayerDirectory()
MemoryCommand.php	Network layer in CLI agent paths output
bootstrap.php	NETWORK.md registration at priority 5, network layer
migrations.php	datamachine_get_network_scaffold_content() + datamachine_migrate_user_md_to_network_scope()
data-machine.php	Wire migration into datamachine_activate_for_site()

Architecture

datamachine-files/           (main site uploads)
├── shared/SITE.md           (site-scoped — correct)
├── agents/{slug}/SOUL.md    (agent-scoped — correct)
├── users/{id}/USER.md       (NOW network-scoped ✅)
└── network/NETWORK.md       (NEW — network-scoped ✅)

Testing

• All 9 modified files pass php -l syntax check
• PHPUnit: 906 tests, same pass/fail ratio as main (5 errors, 24 failures — all pre-existing)
• Migration is idempotent and skips single-site installs

Closes #816. Closes #873.

[github-actions]

Homeboy Results — data-machine

Lint

⚡ Scope: changed files only

✅ lint (changed files only)

Test

Failure Digest

Test Failure Digest

• Failed tests: 7
• No structured test failure details available.
• Full test log: https://github.com/Extra-Chill/data-machine/actions/runs/23273457675

Autofixability classification

• Overall: human_needed
• Autofix enabled: no
• Autofix attempted this run: no
• Human-needed failed commands:
  • test
• Failed commands with available automated fixes:
  • test
• Automated fixes are disabled for this step. Commands with available fix support in this run: test

Machine-readable artifacts

• homeboy-lint-summary.json
• homeboy-test-failures.json
• homeboy-audit-summary.json
• homeboy-autofixability.json

⚡ Scope: changed files only

❌ test (changed files only)

Audit

⚡ Scope: changed files only

✅ audit (changed files only)

Tooling versions

• Homeboy CLI: homeboy 0.81.1+b635feeb
• Extension: wordpress from https://github.com/Extra-Chill/homeboy-extensions
• Extension revision: unknown
• Action: Extra-Chill/homeboy-action@v1

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Homeboy Action v1