REUSE-WP-0019-T01: forge host abstraction + URL migration inventory

reuse_surface/forge_host.py: parse/derive/rewrite raw index URLs across
Gitea and Forgejo (handles both the legacy /raw/<branch>/... form and the
canonical /raw/branch/<branch>/... form both forges serve without a 303
redirect). migrate_source_host() verifies the new URL resolves via HTTP
HEAD before writing -- refuses to point a repo at a host it hasn't
actually migrated to.

New CLI: reuse-surface federation migrate-host --repo <slug> --to
<base-url> [--from <check>] [--dry-run] [--no-verify] [--update-hub].

Inventory: cross-referenced sources.yaml against each repo's actual git
origin. 11/61 repos already on Forgejo; found 2 with stale sources.yaml
entries (activity-core, state-hub) despite having migrated. Fixed for
real: local sources.yaml + production hub registration (hub update),
verified against GET /v1/federated post-migration. config-atlas's
WP-0017-T06 303 confirmed NOT a host-transition symptom (already diagnosed
there as something else).

Also fixed two host-agnostic gaps found while inventorying:
registry_update.py and maintain_llm.py only recognized .gitea/workflows/,
missing repos already on .forgejo/workflows/. Fixed a stale copy-paste
example (state-hub's now-wrong old URL) in docs/RegistryFederation.md, and
a pre-existing unrelated port typo (8088 vs the real llm-connect default
8080) in tools/README.md and registry/README.md.

17 new pytest cases (tests/test_forge_host.py), 106 total pass.
Recomposed federated.yaml post-migration: still 61 capabilities.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

registry/indexes/federated.yaml

@@ -7,7 +7,7 @@ collision_policy: warn
 sources:
 - repo: activity-core
   count: 1
-  url: https://gitea.coulomb.social/coulomb/activity-core/raw/main/registry/indexes/capabilities.yaml
+  url: https://forgejo.coulomb.social/coulomb/activity-core/raw/branch/main/registry/indexes/capabilities.yaml
   cache: registry/federation/cache/activity-core.yaml
 - repo: agentic-resources
   count: 0
@@ -219,7 +219,7 @@ sources:
   cache: registry/federation/cache/shard-wiki.yaml
 - repo: state-hub
   count: 2
-  url: https://gitea.coulomb.social/coulomb/state-hub/raw/main/registry/indexes/capabilities.yaml
+  url: https://forgejo.coulomb.social/coulomb/state-hub/raw/branch/main/registry/indexes/capabilities.yaml
   cache: registry/federation/cache/state-hub.yaml
 - repo: tegwick-control
   count: 0
@@ -266,7 +266,7 @@ capabilities:
   consumption_modes:
   - informational
   source_repo: activity-core
-  source_url: https://gitea.coulomb.social/coulomb/activity-core/raw/main/registry/indexes/capabilities.yaml
+  source_url: https://forgejo.coulomb.social/coulomb/activity-core/raw/branch/main/registry/indexes/capabilities.yaml
   source_index: registry/federation/cache/activity-core.yaml
 - id: capability.agents.cli-assistant
   name: Console-Native LLM Assistant (cya)
@@ -869,6 +869,7 @@ capabilities:
   consumption_modes:
   - informational
   - planning
+  - cli
   source_repo: core-hub
   source_url: https://forgejo.coulomb.social/coulomb/core-hub/raw/branch/main/registry/indexes/capabilities.yaml
   source_index: registry/federation/cache/core-hub.yaml
@@ -1013,7 +1014,7 @@ capabilities:
   summary: "Django application (with a Vite/Tailwind frontend) for managing German\
     \ public-procurement (Vergabe) tender participation \u2014 Ausschreibungs- und\
     \ Teilnahme-Management-System."
-  vector: D1 / A1 / C0 / R0
+  vector: D3 / A1 / C1 / R1
   domain: communication
   status: draft
   owner: vergabe-teilnahme
@@ -1274,7 +1275,7 @@ capabilities:
   consumption_modes:
   - service API
   source_repo: state-hub
-  source_url: https://gitea.coulomb.social/coulomb/state-hub/raw/main/registry/indexes/capabilities.yaml
+  source_url: https://forgejo.coulomb.social/coulomb/state-hub/raw/branch/main/registry/indexes/capabilities.yaml
   source_index: registry/federation/cache/state-hub.yaml
 - id: capability.statehub.workstream-coordinate
   name: Workstream And Task Coordination
@@ -1293,7 +1294,7 @@ capabilities:
   - service API
   - HTTP REST
   source_repo: state-hub
-  source_url: https://gitea.coulomb.social/coulomb/state-hub/raw/main/registry/indexes/capabilities.yaml
+  source_url: https://forgejo.coulomb.social/coulomb/state-hub/raw/branch/main/registry/indexes/capabilities.yaml
   source_index: registry/federation/cache/state-hub.yaml
 - id: capability.wiki.adapter-contract
   name: Capability-Aware Shard Adapter Contract