FG3 build-out: six FG3-x sub-process packages + FG3-1 executable

Adds the six FG3 sub-process packages (processes/fg3-1 .. fg3-6) and wires
them into the FG3 (L2) package via `includes`; FG3 version 0.1.0 -> 0.2.0.

FG3-1 (Rēķina/kredītrēķina saņemšana par precēm/pakalpojumiem) is built out
as an executable L4 package:
- bpmn/rekina-sanemsana.bpmn  - 3-lane process (Nodarbinātais / VPC / Iestāde)
- dmn/rekina-parbaude.dmn     - FIRST hit-policy routing decision table
- resources/                 - roles, agent and mappings binding every user
                               task and the decision to a target
- metadata/                  - ownership, lifecycle, policies

FG3-2..FG3-6 are draft composition placeholders (L4) pending executable
build-out.

Validated against the UAPF 2.2.0 schemas (manifest, ownership, lifecycle,
policies, resource-mapping, enterprise index): all includes resolve, no
duplicated executable artifacts, BPMN/DMN well-formed, and all resource
mapping references resolve to real BPMN/DMN element ids.

processes/fg3-5/metadata/lifecycle.yaml

@@ -0,0 +1,4 @@
+kind: uapf.metadata.lifecycle
+status: draft
+created: "2026-05-19T00:00:00Z"
+lastModified: "2026-05-19T00:00:00Z"

processes/fg3-5/metadata/ownership.yaml

@@ -0,0 +1,8 @@
+kind: uapf.metadata.ownership
+owners:
+  - type: organization
+    id: vpc
+    name: Vienotais pakalpojumu centrs (Valsts Kase)
+    role: owner
+approvers:
+  - vpc.process-office