WeKnora deployment source with the reviewed wiki identity, summary and recovery fixes

migrations/versioned/000086_tenant_skills.up.sql

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+-- Description: Skills installed onto a sandbox config, plus the snapshot chain
+-- ledger. Skills live inside the config's snapshot image; these tables are the
+-- metadata projection and the audit trail for the provider-side snapshots.
+DO $$ BEGIN RAISE NOTICE '[Migration 000086] Creating tenant_skills'; END $$;
+
+CREATE TABLE IF NOT EXISTS tenant_skills (
+    id                    VARCHAR(36)  PRIMARY KEY,
+    tenant_id             BIGINT       NOT NULL,
+    sandbox_config_id     VARCHAR(36)  NOT NULL,
+    name                  VARCHAR(255) NOT NULL,
+    version               VARCHAR(64),
+    description           TEXT,
+    instructions          TEXT,
+    bundle_ref            VARCHAR(1024),
+    bundle_sha256         VARCHAR(64),
+    enabled               BOOLEAN      NOT NULL DEFAULT TRUE,
+    installed_snapshot_id VARCHAR(255),
+    status                VARCHAR(32)  NOT NULL,
+    error                 TEXT,
+    installing_since      TIMESTAMPTZ,
+    created_at            TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
+    updated_at            TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
+    deleted_at            TIMESTAMPTZ
+);
+
+COMMENT ON COLUMN tenant_skills.name IS 'Also the directory name inside the image: /opt/weknora/tenant/skills/<name>';
+COMMENT ON COLUMN tenant_skills.enabled IS 'Visibility to the agent only; files stay in the image until the skill is removed';
+
+-- The unique index doubles as the "list skills of a config" index: its leftmost
+-- prefix is sandbox_config_id. status/enabled are low-cardinality and are
+-- filtered in memory (a config holds tens of skills, not millions).
+CREATE UNIQUE INDEX IF NOT EXISTS uq_tenant_skills_config_name
+    ON tenant_skills (sandbox_config_id, name) WHERE deleted_at IS NULL;
+
+DO $$ BEGIN RAISE NOTICE '[Migration 000086] Creating tenant_skill_snapshots'; END $$;
+
+CREATE TABLE IF NOT EXISTS tenant_skill_snapshots (
+    id                  VARCHAR(36)  PRIMARY KEY,
+    tenant_id           BIGINT       NOT NULL,
+    sandbox_config_id   VARCHAR(36)  NOT NULL,
+    skill_id            VARCHAR(36),
+    snapshot_id         VARCHAR(255),
+    parent_snapshot_id  VARCHAR(255),
+    generation          INTEGER      NOT NULL DEFAULT 0,
+    trigger             VARCHAR(16)  NOT NULL,
+    state               VARCHAR(16)  NOT NULL,
+    superseded_at       TIMESTAMPTZ,
+    created_at          TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
+    updated_at          TIMESTAMPTZ  NOT NULL DEFAULT NOW()
+);
+
+COMMENT ON TABLE tenant_skill_snapshots IS 'Image chain ledger. Old snapshots are kept (state=superseded), never deleted on switch, so the recorded IDs stay resolvable.';
+
+CREATE INDEX IF NOT EXISTS idx_tenant_skill_snapshots_config
+    ON tenant_skill_snapshots (sandbox_config_id);
+CREATE INDEX IF NOT EXISTS idx_tenant_skill_snapshots_state
+    ON tenant_skill_snapshots (state);