feat(db): add Flyway migrations for members, match_cycles, and matche…

db/migration/V0001__Create_members_table.sql

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+CREATE TYPE match_prefs AS ENUM ('mentor', 'mentee', 'both');
+CREATE TYPE industries AS ENUM (
+     'technology', 'finance', 'healthcare', 'education',
+     'consulting', 'government', 'nonprofit', 'other'
+);
+
+
+CREATE TABLE IF NOT EXISTS "members" (
+    id UUID PRIMARY KEY,
+    full_name TEXT NOT NULL,
+    email TEXT UNIQUE NOT NULL,
+    linked_url TEXT,
+    bio TEXT,
+    referral_source TEXT,
+    active BOOLEAN,
+    match_pref match_prefs,
+    industry industries,
+    role TEXT,
+    topics TEXT[],
+    extra_notes TEXT,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);

db/migration/V0002__Create_match_cycles_table.sql

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+CREATE TABLE IF NOT EXISTS "match_cycles" (
+    id UUID PRIMARY KEY,
+    period TEXT,
+    run_at TIMESTAMPTZ NOT NULL,
+    total_members INT,
+    total_matched INT,
+    unmatched_id UUID[]
+);

db/migration/V0003__Create_matches_table.sql

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+CREATE TYPE match_status AS ENUM (
+     'pending',
+     'accepted',
+     'declined',
+     'active',
+     'paused',
+     'completed',
+     'cancelled'
+);
+
+CREATE TABLE IF NOT EXISTS "matches" (
+    id UUID PRIMARY KEY,
+    member_a_id UUID NOT NULL,
+    member_b_id UUID NOT NULL,
+    cycle_id UUID NOT NULL,
+    CONSTRAINT fk_member_a FOREIGN KEY (member_a_id) REFERENCES members(id) ON DELETE CASCADE ON UPDATE CASCADE,
+    CONSTRAINT fk_member_b FOREIGN KEY (member_b_id) REFERENCES members(id) ON DELETE CASCADE ON UPDATE CASCADE,
+    CONSTRAINT fk_cycle FOREIGN KEY (cycle_id) REFERENCES match_cycles(id) ON DELETE CASCADE ON UPDATE CASCADE,
+    match_score REAL,
+    status match_status,
+    feedback_a INT,
+    feedback_b INT,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);